Materiały źródłowe

• #1 Color vision deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/color-vision-deficiency/

  Color vision deficiency (sometimes called color blindness) represents a group of conditions that affect the perception of color. Red-green color vision defects are the most common form of color vision deficiency. Affected individuals have trouble distinguishing between some shades of red, yellow, and green. Blue-yellow color vision defects (also called tritan defects), which are rarer, cause problems with differentiating shades of blue and green and cause difficulty distinguishing dark blue from black. These two forms of color vision deficiency disrupt color perception but do not affect the sharpness of vision (visual acuity). […] Mutations in the OPN1LW, OPN1MW, and OPN1SW genes cause the forms of color vision deficiency described above. The proteins produced from these genes play essential roles in color vision.

• #2 About Colour Blindness – Colour Blind Awareness

  https://www.colourblindawareness.org/colour-blindness/

  Colour (color) blindness (colour vision deficiency, or CVD) affects approximately 1 in 12 men (8%) and 1 in 200 women. […] There are different causes of colour blindness. For most colour blind people their condition is genetic, usually inherited from their mother, although some people become colour blind as a result of other diseases such as diabetes and multiple sclerosis or it can be acquired due to ageing or from taking drugs and medications. […] Problems can arise across the entire colour spectrum potentially affecting perception of all reds, greens, oranges, browns, purples, pinks and greys. Even black can be confused as dark red, dark green or dark blue/purple. […] The effects of colour vision deficiency can be mild, moderate or severe and people with severe forms often think that their condition is mild and doesnt really affect them. […] Statistically speaking most people with a moderate form of red/green colour blindness will only be able to identify accurately 5 or so coloured pencils from a standard box of 24 pencil crayons (although they may correctly guess more using their sub-conscious coping strategies).

• #3 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Color blindness or color vision deficiency (CVD) is the decreased ability to see color or differences in color. The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually a sex-linked inherited problem or variation in the functionality of one or more of the three classes of cone cells in the retina, which mediate color vision. The most common form is caused by a genetic condition called congenital redgreen color blindness (including protan and deutan types), which affects up to 1 in 12 males (8%) and 1 in 200 females (0.5%). The condition is more prevalent in males, because the opsin genes responsible are located on the X chromosome. Rarer genetic conditions causing color blindness include congenital blueyellow color blindness (tritan type), blue cone monochromacy, and achromatopsia. Color blindness can also result from physical or chemical damage to the eye, the optic nerve, parts of the brain, or from medication toxicity. Color vision also naturally degrades in old age.

• #4 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Inherited or congenital/genetic color vision deficiencies are most commonly caused by mutations of the genes encoding opsin proteins. However, several other genes can also lead to less common and/or more severe forms of color blindness. […] Congenital redgreen color blindness is a much rarer form of color blindness including tritanopia/tritanomaly. These conditions are mediated by the OPN1SW gene on Chromosome 7 which encodes the S-opsin protein and follows autosomal dominant inheritance. The cause of blueyellow color blindness is not analogous to the cause of redgreen color blindness, i.e. the peak sensitivity of the S-opsin does not shift to longer wavelengths. Rather, there are 6 known point mutations of OPN1SW that degrade the performance of the S-cones.

• #5 Color Vision – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK470227/

  Color vision results from the combination of signals from 3 visual pigment types within cones: red, green, and blue, corresponding to cone types L, M, and S (RGB-LMS). […] Many forms of color vision recognition abnormalities are present in the population, with most having a genetic origin (congenital). […] The most common forms are protanopia and deuteranopia, conditions arising from the loss of function of 1 of the cones, leading to dichromic vision. […] Protanopia is the loss of L cones (red), resulting in only green-blue vision. […] Deuteranopia is the loss of M cones (green), resulting in red-blue vision only. […] Both are X-linked alleles, therefore almost exclusively occurring in males, occurring with a prevalence of 1%. […] Loss of S cones rarely occurs in 0.01% of males and females.

• #6 Color vision deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/color-vision-deficiency/

  Genetic changes involving the OPN1LW or OPN1MW gene cause red-green color vision defects. These changes lead to an absence of L or M cones or to the production of abnormal opsin pigments in these cones that affect red-green color vision. Blue-yellow color vision defects result from mutations in the OPN1SW gene. These mutations lead to the premature destruction of S cones or the production of defective S cones. […] Blue cone monochromacy occurs when genetic changes affecting the OPN1LW and OPN1MW genes prevent both L and M cones from functioning normally. In people with this condition, only S cones are functional, which leads to reduced visual acuity and poor color vision. The loss of L and M cone function also underlies the other vision problems in people with blue cone monochromacy. […] Some problems with color vision are not caused by gene mutations. These nonhereditary conditions are described as acquired color vision deficiencies. They can be caused by other eye disorders, such as diseases involving the retina, the nerve that carries visual information from the eye to the brain (the optic nerve), or areas of the brain involved in processing visual information. Acquired color vision deficiencies can also be side effects of certain drugs, such as chloroquine (which is used to treat malaria), or result from exposure to particular chemicals, such as organic solvents.

• #7 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Inherited or congenital/genetic color vision deficiencies are most commonly caused by mutations of the genes encoding opsin proteins. However, several other genes can also lead to less common and/or more severe forms of color blindness. […] Congenital redgreen color blindness is a much rarer form of color blindness including tritanopia/tritanomaly. These conditions are mediated by the OPN1SW gene on Chromosome 7 which encodes the S-opsin protein and follows autosomal dominant inheritance. The cause of blueyellow color blindness is not analogous to the cause of redgreen color blindness, i.e. the peak sensitivity of the S-opsin does not shift to longer wavelengths. Rather, there are 6 known point mutations of OPN1SW that degrade the performance of the S-cones.

• #8 Blue-yellow colour blindness | physiology | Britannica

  https://www.britannica.com/science/blue-yellow-colour-blindness

  Blue-yellow colour blindness, by contrast, is an autosomal dominant disorder and therefore is not sex-linked and requires only one copy of the defective gene from either parent to be expressed. […] Achromatopsia is an autosomal recessive disorder, occurring only when two copies of the defective gene.

• #9 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Color blindness or color vision deficiency (CVD) is the decreased ability to see color or differences in color. The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually a sex-linked inherited problem or variation in the functionality of one or more of the three classes of cone cells in the retina, which mediate color vision. The most common form is caused by a genetic condition called congenital redgreen color blindness (including protan and deutan types), which affects up to 1 in 12 males (8%) and 1 in 200 females (0.5%). The condition is more prevalent in males, because the opsin genes responsible are located on the X chromosome. Rarer genetic conditions causing color blindness include congenital blueyellow color blindness (tritan type), blue cone monochromacy, and achromatopsia. Color blindness can also result from physical or chemical damage to the eye, the optic nerve, parts of the brain, or from medication toxicity. Color vision also naturally degrades in old age.

• #10 Congenital red–green color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Congenital_red%E2%80%93green_color_blindness

  Congenital redgreen color blindness is an inherited condition that is the root cause of the majority of cases of color blindness. It is caused by variation in the functionality of the red and/or green opsin proteins, which are the photosensitive pigment in the cone cells of the retina, which mediate color vision. […] The mechanism of congenital redgreen color blindness relates to the functionality of cone cells, specifically to the expression of photopsins, the photopigments that 'catch’ photons and thereby convert light into chemical signals. […] When unequal recombination happens with breaks between the genes, a gene can be essentially deleted from one of the chromosomes. This gene deletion leads to protanopia or deuteranopia (congenital redgreen dichromacy). […] A chimeric gene contains exons contributed from the typical alleles of each of the OPN1MW and OPN1LW genes. Due to the similarity between the genes, these chimeras are always functional, but experience a spectral tuning, i.e. a change to the spectral sensitivity.

• #11 Congenital red–green color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Congenital_red%E2%80%93green_color_blindness

  Congenital redgreen color blindness is an inherited condition that is the root cause of the majority of cases of color blindness. It is caused by variation in the functionality of the red and/or green opsin proteins, which are the photosensitive pigment in the cone cells of the retina, which mediate color vision. […] The mechanism of congenital redgreen color blindness relates to the functionality of cone cells, specifically to the expression of photopsins, the photopigments that 'catch’ photons and thereby convert light into chemical signals. […] When unequal recombination happens with breaks between the genes, a gene can be essentially deleted from one of the chromosomes. This gene deletion leads to protanopia or deuteranopia (congenital redgreen dichromacy). […] A chimeric gene contains exons contributed from the typical alleles of each of the OPN1MW and OPN1LW genes. Due to the similarity between the genes, these chimeras are always functional, but experience a spectral tuning, i.e. a change to the spectral sensitivity.

• #12 Color Vision – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK470227/

  Color vision results from the combination of signals from 3 visual pigment types within cones: red, green, and blue, corresponding to cone types L, M, and S (RGB-LMS). […] Many forms of color vision recognition abnormalities are present in the population, with most having a genetic origin (congenital). […] The most common forms are protanopia and deuteranopia, conditions arising from the loss of function of 1 of the cones, leading to dichromic vision. […] Protanopia is the loss of L cones (red), resulting in only green-blue vision. […] Deuteranopia is the loss of M cones (green), resulting in red-blue vision only. […] Both are X-linked alleles, therefore almost exclusively occurring in males, occurring with a prevalence of 1%. […] Loss of S cones rarely occurs in 0.01% of males and females.

• #13 Colour Vision Deficiency or Colour Blindness – Eyescreen™

  https://eyescreen.cordlifetech.com/sg/colour-vision-deficiency-or-colour-blindness

  Colour vision deficiency is the inability to distinguish certain shades of colour under normal lighting conditions. The term „colour blindness” is more commonly used to describe this visual condition, but very few people are completely colour blind. […] Colour vision is possible due to photoreceptors in the retina of the eye known as cones. These cones have light-sensitive pigments that enable us to recognize colour. Found in the macula (the central part of the retina), each cone is sensitive to either red, green or blue light. The cones recognize these lights based on their wavelengths. […] Normally, the pigments inside the cones register different colours and send the information through the optic nerve to the brain. This enables us to distinguish countless shades of colour. But if the cones lack one or more light-sensitive pigments, we will be unable to see one or more of the three primary colours.

• #14 Colour Vision Deficiency or Colour Blindness – Eyescreen™

  https://eyescreen.cordlifetech.com/sg/colour-vision-deficiency-or-colour-blindness

  Colour vision deficiency is the inability to distinguish certain shades of colour under normal lighting conditions. The term „colour blindness” is more commonly used to describe this visual condition, but very few people are completely colour blind. […] Colour vision is possible due to photoreceptors in the retina of the eye known as cones. These cones have light-sensitive pigments that enable us to recognize colour. Found in the macula (the central part of the retina), each cone is sensitive to either red, green or blue light. The cones recognize these lights based on their wavelengths. […] Normally, the pigments inside the cones register different colours and send the information through the optic nerve to the brain. This enables us to distinguish countless shades of colour. But if the cones lack one or more light-sensitive pigments, we will be unable to see one or more of the three primary colours.

• #15 Pathophysiology and pharmacological study of colour blindness | International Journal of Research in Pharmacology & Pharmacotherapeutics

  https://ijrpp.com/ijrpp/article/view/495

  Color blindness occurs when the person is unable to see colors in a normal way. It is also known as colour deficiency. In Trichromacy, three types of cones are present and working properly. Patient can see all colors on the visible spectrum of light in the traditional way. This is full colour vision. In Anomalous trichromacy. There are three types of cones, but one type isnt as sensitive to light in its wavelength as it should be. As a result, person doesnt see colors in the traditional way, with variations from normal ranging from mild to severe. In Dichromacy, one type of cone is missing. So, only two types of cones (usually S cones along with either L cones or M cones) are present. In Monochromacy: Person has only one type of cone or no cone function at all, so very limited or no ability to see color. There are four main subtypes: a.Protanopia: In this condition, in the person L cones are missing. So, person cant perceive red light. Mostly see colors as shades of blue or gold. b.Deuteranopia: In this condition, in the person M cones are missing. So, person cant perceive green light. Mostly see blues and golds. c.Protanomaly: In this condition, the person has all three cone types, but L cones are less sensitive to red light than they should be. Red may appear as dark gray, and every color that contains red may be less bright. d.Deuteranomaly: In this condition, the person has all three cone types, but M cones are less sensitive to green light than they should be. Mostly see blues, yellows and generally muted colours. The colour blindness can be diagnosed by the Ishihara test, Colour vision test. Colour vision tests and Genetic testing.

• #16 Pathophysiology and pharmacological study of colour blindness | International Journal of Research in Pharmacology & Pharmacotherapeutics

  https://ijrpp.com/ijrpp/article/view/495

  Color blindness occurs when the person is unable to see colors in a normal way. It is also known as colour deficiency. In Trichromacy, three types of cones are present and working properly. Patient can see all colors on the visible spectrum of light in the traditional way. This is full colour vision. In Anomalous trichromacy. There are three types of cones, but one type isnt as sensitive to light in its wavelength as it should be. As a result, person doesnt see colors in the traditional way, with variations from normal ranging from mild to severe. In Dichromacy, one type of cone is missing. So, only two types of cones (usually S cones along with either L cones or M cones) are present. In Monochromacy: Person has only one type of cone or no cone function at all, so very limited or no ability to see color. There are four main subtypes: a.Protanopia: In this condition, in the person L cones are missing. So, person cant perceive red light. Mostly see colors as shades of blue or gold. b.Deuteranopia: In this condition, in the person M cones are missing. So, person cant perceive green light. Mostly see blues and golds. c.Protanomaly: In this condition, the person has all three cone types, but L cones are less sensitive to red light than they should be. Red may appear as dark gray, and every color that contains red may be less bright. d.Deuteranomaly: In this condition, the person has all three cone types, but M cones are less sensitive to green light than they should be. Mostly see blues, yellows and generally muted colours. The colour blindness can be diagnosed by the Ishihara test, Colour vision test. Colour vision tests and Genetic testing.

• #17 Pathophysiology and pharmacological study of colour blindness | International Journal of Research in Pharmacology & Pharmacotherapeutics

  https://ijrpp.com/ijrpp/article/view/495

  Color blindness occurs when the person is unable to see colors in a normal way. It is also known as colour deficiency. In Trichromacy, three types of cones are present and working properly. Patient can see all colors on the visible spectrum of light in the traditional way. This is full colour vision. In Anomalous trichromacy. There are three types of cones, but one type isnt as sensitive to light in its wavelength as it should be. As a result, person doesnt see colors in the traditional way, with variations from normal ranging from mild to severe. In Dichromacy, one type of cone is missing. So, only two types of cones (usually S cones along with either L cones or M cones) are present. In Monochromacy: Person has only one type of cone or no cone function at all, so very limited or no ability to see color. There are four main subtypes: a.Protanopia: In this condition, in the person L cones are missing. So, person cant perceive red light. Mostly see colors as shades of blue or gold. b.Deuteranopia: In this condition, in the person M cones are missing. So, person cant perceive green light. Mostly see blues and golds. c.Protanomaly: In this condition, the person has all three cone types, but L cones are less sensitive to red light than they should be. Red may appear as dark gray, and every color that contains red may be less bright. d.Deuteranomaly: In this condition, the person has all three cone types, but M cones are less sensitive to green light than they should be. Mostly see blues, yellows and generally muted colours. The colour blindness can be diagnosed by the Ishihara test, Colour vision test. Colour vision tests and Genetic testing.

• #18 Pathophysiology and pharmacological study of colour blindness | International Journal of Research in Pharmacology & Pharmacotherapeutics

  https://ijrpp.com/ijrpp/article/view/495

  Color blindness occurs when the person is unable to see colors in a normal way. It is also known as colour deficiency. In Trichromacy, three types of cones are present and working properly. Patient can see all colors on the visible spectrum of light in the traditional way. This is full colour vision. In Anomalous trichromacy. There are three types of cones, but one type isnt as sensitive to light in its wavelength as it should be. As a result, person doesnt see colors in the traditional way, with variations from normal ranging from mild to severe. In Dichromacy, one type of cone is missing. So, only two types of cones (usually S cones along with either L cones or M cones) are present. In Monochromacy: Person has only one type of cone or no cone function at all, so very limited or no ability to see color. There are four main subtypes: a.Protanopia: In this condition, in the person L cones are missing. So, person cant perceive red light. Mostly see colors as shades of blue or gold. b.Deuteranopia: In this condition, in the person M cones are missing. So, person cant perceive green light. Mostly see blues and golds. c.Protanomaly: In this condition, the person has all three cone types, but L cones are less sensitive to red light than they should be. Red may appear as dark gray, and every color that contains red may be less bright. d.Deuteranomaly: In this condition, the person has all three cone types, but M cones are less sensitive to green light than they should be. Mostly see blues, yellows and generally muted colours. The colour blindness can be diagnosed by the Ishihara test, Colour vision test. Colour vision tests and Genetic testing.

• #19 Red-Green Color Blindness – All About Vision

  https://www.allaboutvision.com/conditions/color-blindness/red-green/

  Other causes can include: Eye injuries, Eye diseases such as glaucoma and macular degeneration, Cataracts, Nervous system diseases such as Parkinsons, Alzheimers and multiple sclerosis, Medications such as tiagabine (an anti-seizure drug) and Plaquenil (for rheumatoid arthritis and other autoimmune diseases), Environmental pollutants. […] Red-green color deficiencies come in four varieties based on how much of each color people perceive: Red-blind (protanopia) Red cant be seen, Green-blind (deuteranopia) Green cant be seen, Red-weak (protanomaly) Some red is visible; green and blue are normal, Green-weak (deuteranomaly) Some green is visible; red and blue are normal. […] Protanomaly means people have fewer cones for perceiving red. Deuteranomaly points to fewer cones to see green. These conditions cause slight to moderate differences in color perception.

• #20 Pathophysiology and pharmacological study of colour blindness | International Journal of Research in Pharmacology & Pharmacotherapeutics

  https://ijrpp.com/ijrpp/article/view/495

  Color blindness occurs when the person is unable to see colors in a normal way. It is also known as colour deficiency. In Trichromacy, three types of cones are present and working properly. Patient can see all colors on the visible spectrum of light in the traditional way. This is full colour vision. In Anomalous trichromacy. There are three types of cones, but one type isnt as sensitive to light in its wavelength as it should be. As a result, person doesnt see colors in the traditional way, with variations from normal ranging from mild to severe. In Dichromacy, one type of cone is missing. So, only two types of cones (usually S cones along with either L cones or M cones) are present. In Monochromacy: Person has only one type of cone or no cone function at all, so very limited or no ability to see color. There are four main subtypes: a.Protanopia: In this condition, in the person L cones are missing. So, person cant perceive red light. Mostly see colors as shades of blue or gold. b.Deuteranopia: In this condition, in the person M cones are missing. So, person cant perceive green light. Mostly see blues and golds. c.Protanomaly: In this condition, the person has all three cone types, but L cones are less sensitive to red light than they should be. Red may appear as dark gray, and every color that contains red may be less bright. d.Deuteranomaly: In this condition, the person has all three cone types, but M cones are less sensitive to green light than they should be. Mostly see blues, yellows and generally muted colours. The colour blindness can be diagnosed by the Ishihara test, Colour vision test. Colour vision tests and Genetic testing.

• #21 Pathophysiology and pharmacological study of colour blindness | International Journal of Research in Pharmacology & Pharmacotherapeutics

  https://ijrpp.com/ijrpp/article/view/495

  Color blindness occurs when the person is unable to see colors in a normal way. It is also known as colour deficiency. In Trichromacy, three types of cones are present and working properly. Patient can see all colors on the visible spectrum of light in the traditional way. This is full colour vision. In Anomalous trichromacy. There are three types of cones, but one type isnt as sensitive to light in its wavelength as it should be. As a result, person doesnt see colors in the traditional way, with variations from normal ranging from mild to severe. In Dichromacy, one type of cone is missing. So, only two types of cones (usually S cones along with either L cones or M cones) are present. In Monochromacy: Person has only one type of cone or no cone function at all, so very limited or no ability to see color. There are four main subtypes: a.Protanopia: In this condition, in the person L cones are missing. So, person cant perceive red light. Mostly see colors as shades of blue or gold. b.Deuteranopia: In this condition, in the person M cones are missing. So, person cant perceive green light. Mostly see blues and golds. c.Protanomaly: In this condition, the person has all three cone types, but L cones are less sensitive to red light than they should be. Red may appear as dark gray, and every color that contains red may be less bright. d.Deuteranomaly: In this condition, the person has all three cone types, but M cones are less sensitive to green light than they should be. Mostly see blues, yellows and generally muted colours. The colour blindness can be diagnosed by the Ishihara test, Colour vision test. Colour vision tests and Genetic testing.

• #22 Pathophysiology and pharmacological study of colour blindness | International Journal of Research in Pharmacology & Pharmacotherapeutics

  https://ijrpp.com/ijrpp/article/view/495

  Color blindness occurs when the person is unable to see colors in a normal way. It is also known as colour deficiency. In Trichromacy, three types of cones are present and working properly. Patient can see all colors on the visible spectrum of light in the traditional way. This is full colour vision. In Anomalous trichromacy. There are three types of cones, but one type isnt as sensitive to light in its wavelength as it should be. As a result, person doesnt see colors in the traditional way, with variations from normal ranging from mild to severe. In Dichromacy, one type of cone is missing. So, only two types of cones (usually S cones along with either L cones or M cones) are present. In Monochromacy: Person has only one type of cone or no cone function at all, so very limited or no ability to see color. There are four main subtypes: a.Protanopia: In this condition, in the person L cones are missing. So, person cant perceive red light. Mostly see colors as shades of blue or gold. b.Deuteranopia: In this condition, in the person M cones are missing. So, person cant perceive green light. Mostly see blues and golds. c.Protanomaly: In this condition, the person has all three cone types, but L cones are less sensitive to red light than they should be. Red may appear as dark gray, and every color that contains red may be less bright. d.Deuteranomaly: In this condition, the person has all three cone types, but M cones are less sensitive to green light than they should be. Mostly see blues, yellows and generally muted colours. The colour blindness can be diagnosed by the Ishihara test, Colour vision test. Colour vision tests and Genetic testing.

• #23 Pathophysiology and pharmacological study of colour blindness | International Journal of Research in Pharmacology & Pharmacotherapeutics

  https://ijrpp.com/ijrpp/article/view/495

  Color blindness occurs when the person is unable to see colors in a normal way. It is also known as colour deficiency. In Trichromacy, three types of cones are present and working properly. Patient can see all colors on the visible spectrum of light in the traditional way. This is full colour vision. In Anomalous trichromacy. There are three types of cones, but one type isnt as sensitive to light in its wavelength as it should be. As a result, person doesnt see colors in the traditional way, with variations from normal ranging from mild to severe. In Dichromacy, one type of cone is missing. So, only two types of cones (usually S cones along with either L cones or M cones) are present. In Monochromacy: Person has only one type of cone or no cone function at all, so very limited or no ability to see color. There are four main subtypes: a.Protanopia: In this condition, in the person L cones are missing. So, person cant perceive red light. Mostly see colors as shades of blue or gold. b.Deuteranopia: In this condition, in the person M cones are missing. So, person cant perceive green light. Mostly see blues and golds. c.Protanomaly: In this condition, the person has all three cone types, but L cones are less sensitive to red light than they should be. Red may appear as dark gray, and every color that contains red may be less bright. d.Deuteranomaly: In this condition, the person has all three cone types, but M cones are less sensitive to green light than they should be. Mostly see blues, yellows and generally muted colours. The colour blindness can be diagnosed by the Ishihara test, Colour vision test. Colour vision tests and Genetic testing.

• #24 Causes of Color Vision Deficiency | National Eye Institute

  https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/color-blindness/causes-color-vision-deficiency

  Having color vision deficiency (also called color blindness) means you cant see certain colors the way most people do or you may not see color at all. […] The most common kinds of color vision deficiency are genetic, meaning theyre passed down from parents to their children. […] You can also get color vision deficiency later in life if you have a disease or injury that affects your eyes or brain. […] Color vision deficiency can also happen if your eyes or the part of your brain that helps you see color gets damaged. Common causes of this are: […] Eye diseases like glaucoma or age-related macular degeneration (AMD) […] Brain and nervous system diseases like Alzheimers or multiple sclerosis (MS) […] Some medicines like Plaquenil (a rheumatoid arthritis medicine) […] Eye or brain injuries like retinal detachment and some kinds of tumors.

• #25 Colour Blindness – Visual Surgery

  https://www.visualsurgery.com/general-interest/colour-blindness/

  Colour blindness (colour vision deficiency) is a condition in which certain colours cannot be detected. […] Congenital colour vision defects usually pass from mother to son. These defects are due to partial or complete lack of the light-sensitive photoreceptors (cones) in the retina, the layer of light-sensitive nerve cells lining the back of the eye. Cones distinguish the colours red, green, and blue through visual pigment present in the normal human eye. Problems with colour vision occur when the amount of pigment per cone is reduced, or one or more of the three cone systems are absent. This limits the ability to distinguish between greens and reds, and occasionally blues. […] Most colour vision problems that occur later in life are a result of disease, trauma, toxic effects from drugs, metabolic disease, or vascular disease. colour vision defects from disease are less understood than congenital colour vision problems. There is often uneven involvement of the eyes and the colour vision defect will usually be progressive. Acquired colour vision loss can be the result of damage to the retina or optic nerve.

• #26 Causes of Color Vision Deficiency | National Eye Institute

  https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/color-blindness/causes-color-vision-deficiency

  Having color vision deficiency (also called color blindness) means you cant see certain colors the way most people do or you may not see color at all. […] The most common kinds of color vision deficiency are genetic, meaning theyre passed down from parents to their children. […] You can also get color vision deficiency later in life if you have a disease or injury that affects your eyes or brain. […] Color vision deficiency can also happen if your eyes or the part of your brain that helps you see color gets damaged. Common causes of this are: […] Eye diseases like glaucoma or age-related macular degeneration (AMD) […] Brain and nervous system diseases like Alzheimers or multiple sclerosis (MS) […] Some medicines like Plaquenil (a rheumatoid arthritis medicine) […] Eye or brain injuries like retinal detachment and some kinds of tumors.

• #27 What Causes Color Blindness: Prevalence, Symptoms, Types & More

  https://www.healthline.com/health/color-blindness

  Color blindness occurs when problems with the color-sensing pigments in the eye cause a difficulty or an inability to distinguish colors. […] The majority of color vision deficiency is inherited. It typically passes from mother to son. Inherited color blindness doesn’t cause blindness or other vision loss. […] Diseases that damage the optic nerve or the retina of the eye can cause acquired color blindness. […] The eye contains nerve cells called cones that enable the retina, a light-sensitive layer of tissue in the back of your eye, to see colors. […] If one or more of these cones in your retina is damaged or isn’t present, you’ll have difficulty seeing colors properly. […] You can also have color blindness as a result of disease or injury to your retina. […] With glaucoma, the internal pressure of the eye, or the intraocular pressure, is too high. The pressure damages the optic nerve, which carries signals from the eye to the brain so that you can see. As a result, your ability to distinguish colors may diminish.

• #28 Causes of Color Vision Deficiency | National Eye Institute

  https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/color-blindness/causes-color-vision-deficiency

  Having color vision deficiency (also called color blindness) means you cant see certain colors the way most people do or you may not see color at all. […] The most common kinds of color vision deficiency are genetic, meaning theyre passed down from parents to their children. […] You can also get color vision deficiency later in life if you have a disease or injury that affects your eyes or brain. […] Color vision deficiency can also happen if your eyes or the part of your brain that helps you see color gets damaged. Common causes of this are: […] Eye diseases like glaucoma or age-related macular degeneration (AMD) […] Brain and nervous system diseases like Alzheimers or multiple sclerosis (MS) […] Some medicines like Plaquenil (a rheumatoid arthritis medicine) […] Eye or brain injuries like retinal detachment and some kinds of tumors.

• #29 Color blindness – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/poor-color-vision/symptoms-causes/syc-20354988

  Color blindness is an eye condition in which someone can’t see the difference between certain colors. […] The medical term for color blindness is known as color vision deficiency. […] Color blindness is usually inherited, meaning it’s passed down through families. […] Certain eye diseases and some medicines also can cause color blindness. […] If your cones don’t work properly, you will be unable to distinguish the colors red, green or blue. […] Some conditions that can increase the risk of color deficiency include sickle cell anemia, diabetes, macular degeneration, Alzheimer’s disease, multiple sclerosis, glaucoma, Parkinson’s disease, chronic alcoholism and leukemia. […] Color blindness can be caused by trauma to the eye as a result of injury, surgery, radiation therapy or laser treatment.

• #30 Causes of Color Vision Deficiency | National Eye Institute

  https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/color-blindness/causes-color-vision-deficiency

  Having color vision deficiency (also called color blindness) means you cant see certain colors the way most people do or you may not see color at all. […] The most common kinds of color vision deficiency are genetic, meaning theyre passed down from parents to their children. […] You can also get color vision deficiency later in life if you have a disease or injury that affects your eyes or brain. […] Color vision deficiency can also happen if your eyes or the part of your brain that helps you see color gets damaged. Common causes of this are: […] Eye diseases like glaucoma or age-related macular degeneration (AMD) […] Brain and nervous system diseases like Alzheimers or multiple sclerosis (MS) […] Some medicines like Plaquenil (a rheumatoid arthritis medicine) […] Eye or brain injuries like retinal detachment and some kinds of tumors.

• #31 Causes of Color Vision Deficiency | National Eye Institute

  https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/color-blindness/causes-color-vision-deficiency

  Having color vision deficiency (also called color blindness) means you cant see certain colors the way most people do or you may not see color at all. […] The most common kinds of color vision deficiency are genetic, meaning theyre passed down from parents to their children. […] You can also get color vision deficiency later in life if you have a disease or injury that affects your eyes or brain. […] Color vision deficiency can also happen if your eyes or the part of your brain that helps you see color gets damaged. Common causes of this are: […] Eye diseases like glaucoma or age-related macular degeneration (AMD) […] Brain and nervous system diseases like Alzheimers or multiple sclerosis (MS) […] Some medicines like Plaquenil (a rheumatoid arthritis medicine) […] Eye or brain injuries like retinal detachment and some kinds of tumors.

• #32 What is Color Blindness ? | Color Blindness Definition

  https://enchroma.com/pages/what-is-color-blindness

  Color vision loss can also be a side effect of drugs, or a result from exposure to neuro-toxic chemicals such as styrene, perchloroethylene, toluene, carbon disulfide, n-hexane, and mercury. […] The most common type of color blindness, red-green color blindness which includes protan-type and deutan-type color vision deficiencies, is a genetic condition. […] Some types of color blindness increase with age or develop as a symptom of certain diseases or exposure to toxins like mercury and are not linked to heredity.

• #33 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Color blindness or color vision deficiency (CVD) is the decreased ability to see color or differences in color. The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually a sex-linked inherited problem or variation in the functionality of one or more of the three classes of cone cells in the retina, which mediate color vision. The most common form is caused by a genetic condition called congenital redgreen color blindness (including protan and deutan types), which affects up to 1 in 12 males (8%) and 1 in 200 females (0.5%). The condition is more prevalent in males, because the opsin genes responsible are located on the X chromosome. Rarer genetic conditions causing color blindness include congenital blueyellow color blindness (tritan type), blue cone monochromacy, and achromatopsia. Color blindness can also result from physical or chemical damage to the eye, the optic nerve, parts of the brain, or from medication toxicity. Color vision also naturally degrades in old age.

• #34 Defects of colour vision: A review of congenital and acquired colour vision deficiencies | Hasrod | African Vision and Eye Health

  https://avehjournal.org/index.php/aveh/article/view/365/648

  The highest prevalence of CVD in the general population occurs with red-green colour defects and the pattern of inheritance is X-linked recessive, thus occurring predominantly in males, but is transmitted by females with 8% of the female population being carriers. […] Acquired colour deficiencies are less easy to classify than congenital CVD, but their detection and classification may be an important diagnostic aid. The changes in colour vision are frequently used to monitor ocular pathology and assess treatments. […] According to Schwartz, Kollners rule, which may be applied to acquired colour defects, states that acquired blue-yellow colour defects are the result of changes in the ocular media, choroid and diseases occurring in the outer retinal layers, whilst acquired red-green defects are the result of changes in the optic nerve and more inner parts of the visual pathway. […] The primary difference between congenital and acquired CVDs is that genetic deficiencies present bilaterally at birth with congenital CVD, whereas acquired CVD can be unilateral, asymmetric or even transient.

• #35 Defects of colour vision: A review of congenital and acquired colour vision deficiencies | Hasrod | African Vision and Eye Health

  https://avehjournal.org/index.php/aveh/article/view/365/648

  Colour vision deficiencies (CVDs) can be categorised as being congenital or acquired. Some CVDs are already present at birth, as inherited conditions that are the result of changes at the photo-pigment level and are non-pathological, incurable and do not change over time. Examples are red-green defects which are inherited as an X-linked recessive trait. […] Acquired CVD develops secondary to ocular and systemic conditions or as a side effect of certain medications or sometimes toxic effects of chemicals, and trauma and ageing can also be important in some CVDs. […] CVDs at the retinal level occur when the instructions for the development of the photo-pigments in one or more of the cone cells are defective. The cone cells may be absent or, in the case of the L- and M-cones, may be anomalous in terms of being less sensitive to light, or the visual pathway may not have developed correctly.

• #36 Causes of Colour Blindness – Colour Blind Awareness

  https://www.colourblindawareness.org/colour-blindness/causes-of-colour-blindness/

  Colour blindness is usually a genetic (hereditary) condition (you are born with it). […] The exact physical causes of colour blindness are still being researched, but colour blindness is usually caused by changes to the genetic code sequencing which result in faulty electrical signals being sent to the brain. […] People with normal colour vision have all three types of cone cells/electrical pathways working correctly, but colour blindness occurs when one or more of the cone cell types have abnormal sequencing. […] Most people with colour blindness cant distinguish certain shades of red and green and colours which contain red and green. […] In people with severe forms of red, green or blue CVD one set of cone cell types does not exist at all. […] If you have no cone cells which can distinguish red light you will have protanopia and people with severe forms of colour blindness are dichromats.

• #37 Colour vision deficiency | Eye

  https://www.nature.com/articles/eye2009251

  The genetic alterations have been implicated and the relationship between genotype and phenotype is not completely straightforward. […] There is evidence to suggest that a relatively common point mutation (cys203arg) associated with red-green colour vision deficiency, which results in the disruption of a disulphide bond in the opsin molecule, causes retinal dystrophy. […] The collective evidence suggests that the spectrum of disease caused by the cys203arg mutation is a function of the position in which the mutated gene occurs in the X-chromosome opsin gene array. […] In theory at least, congenital colour vision deficiency could be amenable to gene therapy.

• #38 Colour vision deficiency | Eye

  https://www.nature.com/articles/eye2009251

  The genetic alterations have been implicated and the relationship between genotype and phenotype is not completely straightforward. […] There is evidence to suggest that a relatively common point mutation (cys203arg) associated with red-green colour vision deficiency, which results in the disruption of a disulphide bond in the opsin molecule, causes retinal dystrophy. […] The collective evidence suggests that the spectrum of disease caused by the cys203arg mutation is a function of the position in which the mutated gene occurs in the X-chromosome opsin gene array. […] In theory at least, congenital colour vision deficiency could be amenable to gene therapy.

• #39 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Inherited or congenital/genetic color vision deficiencies are most commonly caused by mutations of the genes encoding opsin proteins. However, several other genes can also lead to less common and/or more severe forms of color blindness. […] Congenital redgreen color blindness is a much rarer form of color blindness including tritanopia/tritanomaly. These conditions are mediated by the OPN1SW gene on Chromosome 7 which encodes the S-opsin protein and follows autosomal dominant inheritance. The cause of blueyellow color blindness is not analogous to the cause of redgreen color blindness, i.e. the peak sensitivity of the S-opsin does not shift to longer wavelengths. Rather, there are 6 known point mutations of OPN1SW that degrade the performance of the S-cones.

• #40 Percieving Colour Blindness | VisionPlus Magazine

  https://visionplusmag.com/eye-matters/percieving-colour-blindness/

  Colour blindness is hereditary, it is caused due to genetic mutations. A recessive gene is carried on the X chromosome. To be affected by these recessive genes all X chromosomes should be affected. Since men have one X and one Y chromosome, the deficiency is majorly seen in men and rarely in women. The ratios say 1 in every 12 men and 1 in every 200 women suffer from colour blindness. […] The cells that are responsible for the colour vision are called cone cells, they are the light detecting cells that are situated at the back of the eye, in the retina. There are 3 types of cone cells namely S that detects light of short wavelength, responsible for blue light; M for medium wavelength, detecting green light and L for long wavelength that detects red light. […] When the light enters the eye, the photoreceptors on the cone cell stimulate and send a message to the brain through the optic nerve. This combination of inputs from all the three photoreceptors allows us to see all the complex colours. But cones cannot identify colours independently. For example, if the M code receives 1000 protons it is unable to calculate if it is looking at blue in bright light or green in low light. But with the signals from the other two cones, the brain calculates the ratio between the cells and determines the colour.

• #41 Percieving Colour Blindness | VisionPlus Magazine

  https://visionplusmag.com/eye-matters/percieving-colour-blindness/

  Colour blindness is hereditary, it is caused due to genetic mutations. A recessive gene is carried on the X chromosome. To be affected by these recessive genes all X chromosomes should be affected. Since men have one X and one Y chromosome, the deficiency is majorly seen in men and rarely in women. The ratios say 1 in every 12 men and 1 in every 200 women suffer from colour blindness. […] The cells that are responsible for the colour vision are called cone cells, they are the light detecting cells that are situated at the back of the eye, in the retina. There are 3 types of cone cells namely S that detects light of short wavelength, responsible for blue light; M for medium wavelength, detecting green light and L for long wavelength that detects red light. […] When the light enters the eye, the photoreceptors on the cone cell stimulate and send a message to the brain through the optic nerve. This combination of inputs from all the three photoreceptors allows us to see all the complex colours. But cones cannot identify colours independently. For example, if the M code receives 1000 protons it is unable to calculate if it is looking at blue in bright light or green in low light. But with the signals from the other two cones, the brain calculates the ratio between the cells and determines the colour.

• #42 Colour Blindness in Rugby | World Rugby

  https://www.world.rugby/organisation/accessibility/colour-blind/what-is-colour-blindness?lang=en

  Colour blindness, or colour vision deficiency, is the inability to perceive colours normally. […] The technical term for colour blindness is colour vision deficiency (CVD). It is usually an inherited condition caused by faulty gene-sequencing in the DNA of the X-chromosome. […] In colour blindness, one of the cone cell types does not operate normally so the brain confuses the electrical signals. […] There are three main types of genetic colour vision deficiency (CVD) which can vary in severity. […] Severe colour vision deficiency is known as dichromacy and in people with dichromacy one of the cone types does not function at all. […] Acquired colour blindness is more likely to affect blue/yellow vision and in some cases can be cured. There is no cure for inherited colour blindness.

• #43 Is Color Blindness More Common in Men?

  https://www.healthline.com/health/color-blindness-more-common-males

  Genetics plays a big role in color blindness. […] People with color blindness cant see some colors, or colors may not appear as vivid. Color blindness can develop with age or with certain conditions, but in most cases its passed through families. […] There are several causes of color blindness, but genetics is the most common. People who have some degree of color blindness usually have difficulty seeing reds and greens, and the red-green color deficiency gene is transferred through an X chromosome. […] Since people who are assigned male at birth have one X and one Y chromosome, a red-green color deficiency gene passed on an X chromosome is likely to result in some level of color blindness. […] Red-green color blindness is commonly passed through families from mother to son on an affected X chromosome. […] When its inherited, or present at birth, its usually passed through the X chromosome, making this deficiency more common in people who are assigned male at birth.

• #44

  https://journals.lww.com/sjio/fulltext/2017/09010/congenital_and_acquired_colour_vision_deficiency.5.aspx

  Congenital colour vision deficiency (CVD) is an x-linked chromosome disorders which, predominantly occurring in males. This disorder results from abnormalities in one or all three-cone type’s photoreceptors. It is mainly affect long wavelength photopigments (red) and middle wavelength photopigments (green). However, the acquired CVD is due to ocular or general pathology as well as due to prolonged use of some medications, which is mostly affect short wavelength photopigments (blue). […] Congenital CVD is caused by inherited photopigments abnormalities in which the retina might be lacking one functional cone photoreceptors, or there may be only one or two cone photopigments. […] Defective colour vision can be acquired due to ocular, neurological or systemic diseases. […] There are many conditions might be affecting the colour perception, such as diseases of ocular media, visual pathway, and pathology of visual cortex, it is mostly affecting the photopigments of Short wavelength (blue-yellow).

• #45 Red-Green Color Blindness – All About Vision

  https://www.allaboutvision.com/conditions/color-blindness/red-green/

  Other causes can include: Eye injuries, Eye diseases such as glaucoma and macular degeneration, Cataracts, Nervous system diseases such as Parkinsons, Alzheimers and multiple sclerosis, Medications such as tiagabine (an anti-seizure drug) and Plaquenil (for rheumatoid arthritis and other autoimmune diseases), Environmental pollutants. […] Red-green color deficiencies come in four varieties based on how much of each color people perceive: Red-blind (protanopia) Red cant be seen, Green-blind (deuteranopia) Green cant be seen, Red-weak (protanomaly) Some red is visible; green and blue are normal, Green-weak (deuteranomaly) Some green is visible; red and blue are normal. […] Protanomaly means people have fewer cones for perceiving red. Deuteranomaly points to fewer cones to see green. These conditions cause slight to moderate differences in color perception.

• #46 Is Color Blindness More Common in Men?

  https://www.healthline.com/health/color-blindness-more-common-males

  Genetics plays a big role in color blindness. […] People with color blindness cant see some colors, or colors may not appear as vivid. Color blindness can develop with age or with certain conditions, but in most cases its passed through families. […] There are several causes of color blindness, but genetics is the most common. People who have some degree of color blindness usually have difficulty seeing reds and greens, and the red-green color deficiency gene is transferred through an X chromosome. […] Since people who are assigned male at birth have one X and one Y chromosome, a red-green color deficiency gene passed on an X chromosome is likely to result in some level of color blindness. […] Red-green color blindness is commonly passed through families from mother to son on an affected X chromosome. […] When its inherited, or present at birth, its usually passed through the X chromosome, making this deficiency more common in people who are assigned male at birth.

• #47 What is colour blindness and how does it affect people? – BBC Newsround

  https://www.bbc.co.uk/newsround/56429084

  Others may have something known as blue-yellow colour blindness, although this is a lot less common. […] Achromatopsia is extremely rare. A person with the condition isn’t able to see any colour at all. […] Colour vision deficiency can impact children in the classroom if they’re unable to tell the difference between colours while they’re doing their work. […] A person with colour vision deficiency taking part in a football match for example may struggle to tell the difference between the kits or coloured bibs their team and the opponents are wearing. […] Colour blindness can impact lots of other areas of a person’s life from shopping for food and clothes, to cooking, gardening and for adults, driving.

• #48 Color vision deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/color-vision-deficiency/

  Color vision deficiency (sometimes called color blindness) represents a group of conditions that affect the perception of color. Red-green color vision defects are the most common form of color vision deficiency. Affected individuals have trouble distinguishing between some shades of red, yellow, and green. Blue-yellow color vision defects (also called tritan defects), which are rarer, cause problems with differentiating shades of blue and green and cause difficulty distinguishing dark blue from black. These two forms of color vision deficiency disrupt color perception but do not affect the sharpness of vision (visual acuity). […] Mutations in the OPN1LW, OPN1MW, and OPN1SW genes cause the forms of color vision deficiency described above. The proteins produced from these genes play essential roles in color vision.

• #49 Blue-yellow colour blindness | physiology | Britannica

  https://www.britannica.com/science/blue-yellow-colour-blindness

  Blue-yellow colour blindness, by contrast, is an autosomal dominant disorder and therefore is not sex-linked and requires only one copy of the defective gene from either parent to be expressed. […] Achromatopsia is an autosomal recessive disorder, occurring only when two copies of the defective gene.

• #50 Defects of colour vision: A review of congenital and acquired colour vision deficiencies | Hasrod | African Vision and Eye Health

  https://avehjournal.org/index.php/aveh/article/view/365/648

  The highest prevalence of CVD in the general population occurs with red-green colour defects and the pattern of inheritance is X-linked recessive, thus occurring predominantly in males, but is transmitted by females with 8% of the female population being carriers. […] Acquired colour deficiencies are less easy to classify than congenital CVD, but their detection and classification may be an important diagnostic aid. The changes in colour vision are frequently used to monitor ocular pathology and assess treatments. […] According to Schwartz, Kollners rule, which may be applied to acquired colour defects, states that acquired blue-yellow colour defects are the result of changes in the ocular media, choroid and diseases occurring in the outer retinal layers, whilst acquired red-green defects are the result of changes in the optic nerve and more inner parts of the visual pathway. […] The primary difference between congenital and acquired CVDs is that genetic deficiencies present bilaterally at birth with congenital CVD, whereas acquired CVD can be unilateral, asymmetric or even transient.

• #51 What is colour blindness and how does it affect people? – BBC Newsround

  https://www.bbc.co.uk/newsround/56429084

  Others may have something known as blue-yellow colour blindness, although this is a lot less common. […] Achromatopsia is extremely rare. A person with the condition isn’t able to see any colour at all. […] Colour vision deficiency can impact children in the classroom if they’re unable to tell the difference between colours while they’re doing their work. […] A person with colour vision deficiency taking part in a football match for example may struggle to tell the difference between the kits or coloured bibs their team and the opponents are wearing. […] Colour blindness can impact lots of other areas of a person’s life from shopping for food and clothes, to cooking, gardening and for adults, driving.

• #52 Color Blindness: How It Happens and What Causes It

  https://www.webmd.com/eye-health/color-blindness

  Complete Color Blindness is also called monochromacy, you dont see any color at all and your vision may not be as clear. […] Rod monochromacy, also known as achromatopsia, is the most severe form of color blindness. None of your cone cells have photopigments that work. As a result, the world appears to you in black, white, and gray.

• #53 Color Blindness: How It Happens and What Causes It

  https://www.webmd.com/eye-health/color-blindness

  Complete Color Blindness is also called monochromacy, you dont see any color at all and your vision may not be as clear. […] Rod monochromacy, also known as achromatopsia, is the most severe form of color blindness. None of your cone cells have photopigments that work. As a result, the world appears to you in black, white, and gray.

• #54 Blue-yellow colour blindness | physiology | Britannica

  https://www.britannica.com/science/blue-yellow-colour-blindness

  Blue-yellow colour blindness, by contrast, is an autosomal dominant disorder and therefore is not sex-linked and requires only one copy of the defective gene from either parent to be expressed. […] Achromatopsia is an autosomal recessive disorder, occurring only when two copies of the defective gene.

• #55 Colorblindness-Achromatopsia 4 | Hereditary Ocular Diseases

  https://disorders.eyes.arizona.edu/handouts/colorblindness-achromatopsia-4

  The light sensitive cells in the retina are called rods (useful in dim vision) and cones (used for color vision). Gene mutations can impact either or both types. Those that cause a dysfunction in cones result in defective color vision of various types, sometimes called colorblindness or achromatopsia. […] This is a form of inherited colorblindness in which little or no color is perceived. At least 4 mutations cause achromatopsia and this one accounts for less than 2% of cases. […] Like other types of achromatopsia, patients with type 4 are born with poor vision and little or no color discrimination. […] The ERG (electroretinogram), an electrical test that measures retinal responses to light, reveals that the cones are nonfunctional while the rods function normally. […] This is considered to be a stationary disorder but a few patients have experienced a worsening of vision with age.

• #56 Color vision deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/color-vision-deficiency/

  Genetic changes involving the OPN1LW or OPN1MW gene cause red-green color vision defects. These changes lead to an absence of L or M cones or to the production of abnormal opsin pigments in these cones that affect red-green color vision. Blue-yellow color vision defects result from mutations in the OPN1SW gene. These mutations lead to the premature destruction of S cones or the production of defective S cones. […] Blue cone monochromacy occurs when genetic changes affecting the OPN1LW and OPN1MW genes prevent both L and M cones from functioning normally. In people with this condition, only S cones are functional, which leads to reduced visual acuity and poor color vision. The loss of L and M cone function also underlies the other vision problems in people with blue cone monochromacy. […] Some problems with color vision are not caused by gene mutations. These nonhereditary conditions are described as acquired color vision deficiencies. They can be caused by other eye disorders, such as diseases involving the retina, the nerve that carries visual information from the eye to the brain (the optic nerve), or areas of the brain involved in processing visual information. Acquired color vision deficiencies can also be side effects of certain drugs, such as chloroquine (which is used to treat malaria), or result from exposure to particular chemicals, such as organic solvents.

• #57 Color vision deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/color-vision-deficiency/

  Genetic changes involving the OPN1LW or OPN1MW gene cause red-green color vision defects. These changes lead to an absence of L or M cones or to the production of abnormal opsin pigments in these cones that affect red-green color vision. Blue-yellow color vision defects result from mutations in the OPN1SW gene. These mutations lead to the premature destruction of S cones or the production of defective S cones. […] Blue cone monochromacy occurs when genetic changes affecting the OPN1LW and OPN1MW genes prevent both L and M cones from functioning normally. In people with this condition, only S cones are functional, which leads to reduced visual acuity and poor color vision. The loss of L and M cone function also underlies the other vision problems in people with blue cone monochromacy. […] Some problems with color vision are not caused by gene mutations. These nonhereditary conditions are described as acquired color vision deficiencies. They can be caused by other eye disorders, such as diseases involving the retina, the nerve that carries visual information from the eye to the brain (the optic nerve), or areas of the brain involved in processing visual information. Acquired color vision deficiencies can also be side effects of certain drugs, such as chloroquine (which is used to treat malaria), or result from exposure to particular chemicals, such as organic solvents.

• #58 Defects of colour vision: A review of congenital and acquired colour vision deficiencies | Hasrod | African Vision and Eye Health

  https://avehjournal.org/index.php/aveh/article/view/365/648

  The highest prevalence of CVD in the general population occurs with red-green colour defects and the pattern of inheritance is X-linked recessive, thus occurring predominantly in males, but is transmitted by females with 8% of the female population being carriers. […] Acquired colour deficiencies are less easy to classify than congenital CVD, but their detection and classification may be an important diagnostic aid. The changes in colour vision are frequently used to monitor ocular pathology and assess treatments. […] According to Schwartz, Kollners rule, which may be applied to acquired colour defects, states that acquired blue-yellow colour defects are the result of changes in the ocular media, choroid and diseases occurring in the outer retinal layers, whilst acquired red-green defects are the result of changes in the optic nerve and more inner parts of the visual pathway. […] The primary difference between congenital and acquired CVDs is that genetic deficiencies present bilaterally at birth with congenital CVD, whereas acquired CVD can be unilateral, asymmetric or even transient.

• #59

• #60 What Causes Color Blindness: Prevalence, Symptoms, Types & More

  https://www.healthline.com/health/color-blindness

  Color blindness occurs when problems with the color-sensing pigments in the eye cause a difficulty or an inability to distinguish colors. […] The majority of color vision deficiency is inherited. It typically passes from mother to son. Inherited color blindness doesn’t cause blindness or other vision loss. […] Diseases that damage the optic nerve or the retina of the eye can cause acquired color blindness. […] The eye contains nerve cells called cones that enable the retina, a light-sensitive layer of tissue in the back of your eye, to see colors. […] If one or more of these cones in your retina is damaged or isn’t present, you’ll have difficulty seeing colors properly. […] You can also have color blindness as a result of disease or injury to your retina. […] With glaucoma, the internal pressure of the eye, or the intraocular pressure, is too high. The pressure damages the optic nerve, which carries signals from the eye to the brain so that you can see. As a result, your ability to distinguish colors may diminish.

• #61 How you can become colour blind later on in life

  https://www.topdoctors.co.uk/medical-articles/can-you-become-colour-blind-later-in-life

  Acquired colour blindness can develop later in life through different diseases or eye conditions. […] Acquired colour blindness, meaning colour blindness which people are not born with but appears later in life, is rare and most people with colour blindness are born with it. […] Colour blindness can develop later in life and it can affect men and women equally. […] Acquired colour blindness can be associated with a range of different eye conditions. […] In patients over 50 years of age, a condition known as age-related macular degeneration (AMD) can cause symptoms of blurring and problems detecting colours accurately. […] Other eye diseases can rarely cause altered colour vision such as diabetic eye disease or glaucoma. […] Diseases which affect the brain and optic nerve such as multiple sclerosis can also cause loss of colour vision.

• #62 What Causes Color Blindness: Prevalence, Symptoms, Types & More

  https://www.healthline.com/health/color-blindness

  Macular degeneration and diabetic retinopathy cause damage to the retina, which is where the cones are located. This can cause color blindness. […] Certain medications can cause changes in color vision. […] Color blindness may also be due to other factors. One factor is aging. Vision loss and color deficiency can happen gradually with age. Additionally, toxic chemicals such as styrene, which is present in some plastics, are linked to the loss of ability to see color.

• #63 Appropriate terminology in the nomenclature of the color vision deficiency

  https://www.oatext.com/appropriate-terminology-in-the-nomenclature-of-the-color-vision-deficiency.php

  The inherited color vision deficiency which is usually caused by X-linked recessive gene, which is passed from a mother to her son. […] Secondary color vision deficiency is related to damages of the optic nerve or retina because of various diseases and injuries. […] Acquired blue-yellow CVDs may be related to the changes of ocular media such as cataract or changes associated aging in crystalline lens and diseases affecting choroid and the outer retinal layers. […] Acquired red-green CVDs may be resulted of the diseases of optic nerve and inner visual pathway. […] Retinopathies cause often tritan or blue-yellow CVD while as optic neuropathies (traumatic or toxic) cause red-green CDVs.

• #64 COLOR BLINDNESS: CAUSES, TYPES, SYMPTOMS, TREATMENT AND MORE | Mya Care

  https://myacare.com/blog/color-blindness-causes-types-symptoms-treatment-and-more

  Inherited color blindness is passed down from parents who carry the genes for it on the X chromosome. Color vision deficiency genes include: CNGA3, CNGB3, GNAT2, OPN1LW, OPN1MW, ATF6, PDE6H, and PDE6C. […] The exact mechanisms of acquired color deficiencies are not fully understood. It is thought that medications and eye diseases can affect how color-sensitive cones in the eyes work, causing color vision deficiency. […] Health conditions associated with acquired color blindness include: optic nerve neuropathy, age-related macular degeneration, cataracts, glaucoma, diabetic retinopathy, retinitis pigmentosa, macular edema, uveitis, retinal detachment, optic neuritis, eye injuries, brain tumors, neurological diseases like Alzheimer’s disease, Parkinson’s disease and multiple sclerosis. […] Gene therapy is a cutting-edge treatment that aims to correct genetic mutations responsible for color vision deficiencies. By introducing healthy genes into the retina, researchers hope to restore normal color vision. […] This approach has shown success in preclinical and clinical trials, providing hope for individuals with inherited color blindness.

• #65 Appropriate terminology in the nomenclature of the color vision deficiency

  https://www.oatext.com/appropriate-terminology-in-the-nomenclature-of-the-color-vision-deficiency.php

  The inherited color vision deficiency which is usually caused by X-linked recessive gene, which is passed from a mother to her son. […] Secondary color vision deficiency is related to damages of the optic nerve or retina because of various diseases and injuries. […] Acquired blue-yellow CVDs may be related to the changes of ocular media such as cataract or changes associated aging in crystalline lens and diseases affecting choroid and the outer retinal layers. […] Acquired red-green CVDs may be resulted of the diseases of optic nerve and inner visual pathway. […] Retinopathies cause often tritan or blue-yellow CVD while as optic neuropathies (traumatic or toxic) cause red-green CDVs.

• #66 COLOR BLINDNESS: CAUSES, TYPES, SYMPTOMS, TREATMENT AND MORE | Mya Care

  https://myacare.com/blog/color-blindness-causes-types-symptoms-treatment-and-more

  Inherited color blindness is passed down from parents who carry the genes for it on the X chromosome. Color vision deficiency genes include: CNGA3, CNGB3, GNAT2, OPN1LW, OPN1MW, ATF6, PDE6H, and PDE6C. […] The exact mechanisms of acquired color deficiencies are not fully understood. It is thought that medications and eye diseases can affect how color-sensitive cones in the eyes work, causing color vision deficiency. […] Health conditions associated with acquired color blindness include: optic nerve neuropathy, age-related macular degeneration, cataracts, glaucoma, diabetic retinopathy, retinitis pigmentosa, macular edema, uveitis, retinal detachment, optic neuritis, eye injuries, brain tumors, neurological diseases like Alzheimer’s disease, Parkinson’s disease and multiple sclerosis. […] Gene therapy is a cutting-edge treatment that aims to correct genetic mutations responsible for color vision deficiencies. By introducing healthy genes into the retina, researchers hope to restore normal color vision. […] This approach has shown success in preclinical and clinical trials, providing hope for individuals with inherited color blindness.

• #67 Colour Vision Deficiency and Symptoms – The Retina Center

  https://www.theretinacentre.com/blogs/what-is-colour-vision-deficiency-and-what-are-its-symptoms/

  The red colour that you see may be black for many. Many of them are among us! […] Colour blindness is not always benign! It can be a symptom of underlying diseases! […] Health conditions like diabetes, AMD, and glaucoma can affect the rod cells in the retina. […] Nervous problems like Multiple Sclerosis can also lead to colour blindness! MS affects Occipital Lobe which is responsible for vision and colour determination. […] Prolonged exposure to toxic chemicals such as carbon disulphide and styrene has been shown to cause colour blindness in humans. […] At present, we have no permanent cure for colour blindness but the scientific community is rapidly progressing toward a breakthrough in this field!

• #68 COLOR BLINDNESS: CAUSES, TYPES, SYMPTOMS, TREATMENT AND MORE | Mya Care

  https://myacare.com/blog/color-blindness-causes-types-symptoms-treatment-and-more

  Inherited color blindness is passed down from parents who carry the genes for it on the X chromosome. Color vision deficiency genes include: CNGA3, CNGB3, GNAT2, OPN1LW, OPN1MW, ATF6, PDE6H, and PDE6C. […] The exact mechanisms of acquired color deficiencies are not fully understood. It is thought that medications and eye diseases can affect how color-sensitive cones in the eyes work, causing color vision deficiency. […] Health conditions associated with acquired color blindness include: optic nerve neuropathy, age-related macular degeneration, cataracts, glaucoma, diabetic retinopathy, retinitis pigmentosa, macular edema, uveitis, retinal detachment, optic neuritis, eye injuries, brain tumors, neurological diseases like Alzheimer’s disease, Parkinson’s disease and multiple sclerosis. […] Gene therapy is a cutting-edge treatment that aims to correct genetic mutations responsible for color vision deficiencies. By introducing healthy genes into the retina, researchers hope to restore normal color vision. […] This approach has shown success in preclinical and clinical trials, providing hope for individuals with inherited color blindness.

• #69 Color blindness – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/poor-color-vision/symptoms-causes/syc-20354988

  Color blindness is an eye condition in which someone can’t see the difference between certain colors. […] The medical term for color blindness is known as color vision deficiency. […] Color blindness is usually inherited, meaning it’s passed down through families. […] Certain eye diseases and some medicines also can cause color blindness. […] If your cones don’t work properly, you will be unable to distinguish the colors red, green or blue. […] Some conditions that can increase the risk of color deficiency include sickle cell anemia, diabetes, macular degeneration, Alzheimer’s disease, multiple sclerosis, glaucoma, Parkinson’s disease, chronic alcoholism and leukemia. […] Color blindness can be caused by trauma to the eye as a result of injury, surgery, radiation therapy or laser treatment.

• #70 Colour Vision Deficiency: Definition, Causes, Symptoms, Diagnosis, and Treatment

  https://www.oscarwylee.com.au/glasses/eye/colour-vision-deficiency

  A stroke may lead to colour vision deficiency if the stroke has impacted the part of the brain that helps the eyes see colour. […] Other medical conditions including liver disease and diabetes may lead to colour vision deficiency. […] The use of specific medications may lead to colour blindness, which is known as acquired colour vision defects meaning the colour blindness is not inherited. […] Exposure to certain chemicals may lead to colour vision deficiency. […] Damage to the optic nerve may cause a degree of colour vision deficiency, or colour blindness. […] Those at risk for having colour vision deficiency or colour blindness include men and those with eye conditions such as glaucoma and age-related macular degeneration (AMD). […] Colour vision deficiency or colour blindness can generally be treated through the use of glasses or contact lenses, however, the effectiveness of these devices will be different for everyone and are not a cure.

• #71 COLOR BLINDNESS: CAUSES, TYPES, SYMPTOMS, TREATMENT AND MORE | Mya Care

  https://myacare.com/blog/color-blindness-causes-types-symptoms-treatment-and-more

  Inherited color blindness is passed down from parents who carry the genes for it on the X chromosome. Color vision deficiency genes include: CNGA3, CNGB3, GNAT2, OPN1LW, OPN1MW, ATF6, PDE6H, and PDE6C. […] The exact mechanisms of acquired color deficiencies are not fully understood. It is thought that medications and eye diseases can affect how color-sensitive cones in the eyes work, causing color vision deficiency. […] Health conditions associated with acquired color blindness include: optic nerve neuropathy, age-related macular degeneration, cataracts, glaucoma, diabetic retinopathy, retinitis pigmentosa, macular edema, uveitis, retinal detachment, optic neuritis, eye injuries, brain tumors, neurological diseases like Alzheimer’s disease, Parkinson’s disease and multiple sclerosis. […] Gene therapy is a cutting-edge treatment that aims to correct genetic mutations responsible for color vision deficiencies. By introducing healthy genes into the retina, researchers hope to restore normal color vision. […] This approach has shown success in preclinical and clinical trials, providing hope for individuals with inherited color blindness.

• #72 Color vision deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/color-vision-deficiency/

  Genetic changes involving the OPN1LW or OPN1MW gene cause red-green color vision defects. These changes lead to an absence of L or M cones or to the production of abnormal opsin pigments in these cones that affect red-green color vision. Blue-yellow color vision defects result from mutations in the OPN1SW gene. These mutations lead to the premature destruction of S cones or the production of defective S cones. […] Blue cone monochromacy occurs when genetic changes affecting the OPN1LW and OPN1MW genes prevent both L and M cones from functioning normally. In people with this condition, only S cones are functional, which leads to reduced visual acuity and poor color vision. The loss of L and M cone function also underlies the other vision problems in people with blue cone monochromacy. […] Some problems with color vision are not caused by gene mutations. These nonhereditary conditions are described as acquired color vision deficiencies. They can be caused by other eye disorders, such as diseases involving the retina, the nerve that carries visual information from the eye to the brain (the optic nerve), or areas of the brain involved in processing visual information. Acquired color vision deficiencies can also be side effects of certain drugs, such as chloroquine (which is used to treat malaria), or result from exposure to particular chemicals, such as organic solvents.

• #73 Red-Green Color Blindness – All About Vision

  https://www.allaboutvision.com/conditions/color-blindness/red-green/

  Other causes can include: Eye injuries, Eye diseases such as glaucoma and macular degeneration, Cataracts, Nervous system diseases such as Parkinsons, Alzheimers and multiple sclerosis, Medications such as tiagabine (an anti-seizure drug) and Plaquenil (for rheumatoid arthritis and other autoimmune diseases), Environmental pollutants. […] Red-green color deficiencies come in four varieties based on how much of each color people perceive: Red-blind (protanopia) Red cant be seen, Green-blind (deuteranopia) Green cant be seen, Red-weak (protanomaly) Some red is visible; green and blue are normal, Green-weak (deuteranomaly) Some green is visible; red and blue are normal. […] Protanomaly means people have fewer cones for perceiving red. Deuteranomaly points to fewer cones to see green. These conditions cause slight to moderate differences in color perception.

• #74 Red-Green Color Blindness – All About Vision

  https://www.allaboutvision.com/conditions/color-blindness/red-green/

  Other causes can include: Eye injuries, Eye diseases such as glaucoma and macular degeneration, Cataracts, Nervous system diseases such as Parkinsons, Alzheimers and multiple sclerosis, Medications such as tiagabine (an anti-seizure drug) and Plaquenil (for rheumatoid arthritis and other autoimmune diseases), Environmental pollutants. […] Red-green color deficiencies come in four varieties based on how much of each color people perceive: Red-blind (protanopia) Red cant be seen, Green-blind (deuteranopia) Green cant be seen, Red-weak (protanomaly) Some red is visible; green and blue are normal, Green-weak (deuteranomaly) Some green is visible; red and blue are normal. […] Protanomaly means people have fewer cones for perceiving red. Deuteranomaly points to fewer cones to see green. These conditions cause slight to moderate differences in color perception.

• #75 Is it true that colour blindness only affects boys? – Montreal Children’s Hospital

  https://montrealchildrenshospital.ca/health-info/is-it-true-that-colour-blindness-only-affects-boys/

  Its estimated that up to eight per cent of boys have some degree of colour blindness (also known as colour vision deficiency or CVD), whereas less than one per cent of girls do. […] For most people with the condition, its genetically inherited from their mothers on the 23rd chromosome. […] For a boy to be red-green colour blind, its just a matter of a faulty colour-blindness gene on his X chromosome. […] For girls, that faulty gene must be present on both their X chromosomes hence the greater prevalence of red-green colour blindness among males. […] Note however, that blue colour blindness affects boys and girls equally, since it is carried on a non-sex chromosome. […] If these cones dont function correctly, then the brain gets inaccurate messages about colour. […] People can also become colour blind as a result of diabetes, multiple sclerosis and other diseases. […] They can also acquire the condition over time as a result of aging or the use of certain drugs such as antibiotics and high-blood pressure medications.

• #76 Colour Vision Deficiency and Symptoms – The Retina Center

  https://www.theretinacentre.com/blogs/what-is-colour-vision-deficiency-and-what-are-its-symptoms/

  The red colour that you see may be black for many. Many of them are among us! […] Colour blindness is not always benign! It can be a symptom of underlying diseases! […] Health conditions like diabetes, AMD, and glaucoma can affect the rod cells in the retina. […] Nervous problems like Multiple Sclerosis can also lead to colour blindness! MS affects Occipital Lobe which is responsible for vision and colour determination. […] Prolonged exposure to toxic chemicals such as carbon disulphide and styrene has been shown to cause colour blindness in humans. […] At present, we have no permanent cure for colour blindness but the scientific community is rapidly progressing toward a breakthrough in this field!

• #77 What is Color Blindness ? | Color Blindness Definition

  https://enchroma.com/pages/what-is-color-blindness

  Color vision loss can also be a side effect of drugs, or a result from exposure to neuro-toxic chemicals such as styrene, perchloroethylene, toluene, carbon disulfide, n-hexane, and mercury. […] The most common type of color blindness, red-green color blindness which includes protan-type and deutan-type color vision deficiencies, is a genetic condition. […] Some types of color blindness increase with age or develop as a symptom of certain diseases or exposure to toxins like mercury and are not linked to heredity.

• #78 What Is Color Blindness? Condition and Types Explained

  https://www.verywellhealth.com/what-does-it-mean-to-be-color-blind-3422068

  Color blindness, or color vision deficiency, refers to the inability of a person to correctly distinguish certain colors. […] When one has color blindness, one or multiple cone types are either absent or not functioning properly, resulting in them not seeing certain colors or seeing colors differently. […] Color blindness is caused by cells in the retina that incorrectly process colors. Specialized cone cells, which are responsible for color vision, lack the ability to send the correct signals to the brain. […] Color blindness is usually hereditary, meaning that the condition is typically passed down from parents. […] Occasionally, certain diseases can affect the eyes or the brain and cause color blindness, referred to as „acquired color blindness.” […] Some medications, notably Plaquenil (hydroxychloroquine), can affect the cells in the eyes and sometimes cause color blindness. […] Aging can also cause the disorder; as the lens darkens with age, older people may find it difficult to distinguish colors.

• #79 Appropriate terminology in the nomenclature of the color vision deficiency

  https://www.oatext.com/appropriate-terminology-in-the-nomenclature-of-the-color-vision-deficiency.php

  The inherited color vision deficiency which is usually caused by X-linked recessive gene, which is passed from a mother to her son. […] Secondary color vision deficiency is related to damages of the optic nerve or retina because of various diseases and injuries. […] Acquired blue-yellow CVDs may be related to the changes of ocular media such as cataract or changes associated aging in crystalline lens and diseases affecting choroid and the outer retinal layers. […] Acquired red-green CVDs may be resulted of the diseases of optic nerve and inner visual pathway. […] Retinopathies cause often tritan or blue-yellow CVD while as optic neuropathies (traumatic or toxic) cause red-green CDVs.

• #80 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Diagnosis of color blindness is usually done with a color vision test, such as the Ishihara test. There is no cure for most causes of color blindness; however, there is ongoing research into gene therapy for some severe conditions causing color blindness. Minor forms of color blindness do not significantly affect daily life and the color blind automatically develop adaptations and coping mechanisms to compensate for the deficiency. However, diagnosis may allow an individual, or their parents/teachers, to actively accommodate the condition. […] Color blindness is any deviation of color vision from normal trichromatic color vision that produces a reduced gamut. Mechanisms for color blindness are related to the functionality of cone cells, and often to the expression of photopsins, the photopigments that 'catch’ photons and thereby convert light into chemical signals. Color vision deficiencies can be classified as inherited or acquired.

• #81 Colour Vision Deficiency – Fighting Blindness incorporating The National League of the Blind

  https://www.fightingblindness.ie/living-with-sight-loss/eye-conditions/colour-blindness/

  Inherited colour vision deficiency is most common affecting both eyes. […] Some medications and chemicals have also been linked with this condition. […] Currently, there is no treatment for colour vision deficiency, but researchers are working to change this. […] Researchers are actively searching for ways to treat colour vision deficiency. […] Much of this effort has focused on developing gene therapies, although other therapeutic avenues have been investigated. […] There are clinical trials ongoing which are examining gene therapies for total colour vision deficiency. […] Gene therapy is a therapeutic approach which has proven safe in other retinal conditions. […] Using this technique, researchers have engineered small, safe viruses which aim to deliver the correct version of the gene of interest to the light sensing photoreceptor cells in the retina.

• #82 Color Therapy | Harvard Medicine Magazine

  https://magazine.hms.harvard.edu/articles/color-therapy

  About ten percent of men are to some degree red-green color-blind. Roughly 1.5 percent of men cannot distinguish reds from greens because they lack either the red- or green-sensitive cone pigments, but for the most part, color blindness results when one of the three types of visual pigments doesnt work normally. […] People who are color-blind, however, may one day have an opportunity to experience the full spectrum of color vision, according to Jason Comander 06, an instructor in ophthalmology at Massachusetts Eye and Ear. Researchers at the University of Washington have developed gene therapy that restores the gene that codes for the missing or faulty light-sensitive pigment, allowing cone cells to detect colors that they could not detect previously. […] It isnt clear yet whether the therapy works beyond restoring red sensitivity to the cone cells. Does it, for example, also affect the complex wiring inside the retina and the brain that contributes to the processing of color vision within the visual cortex?

• #83 Gene therapy used to successfully treat color blindness in adult monkeys | UW News

  https://www.washington.edu/news/2009/09/15/gene-therapy-used-to-successfully-treat-color-blindness-in-adult-monkeys/

  University of Washington (UW) researchers at the UW Medicine Eye Institute have successfully used gene therapy to cure color blindness in adult monkeys. Red-green color blindness, which results from loss of either the red- or green-sensitive visual pigment in the eye, is the most common genetic disorder. […] The results of Mancuso and colleagues reported in Nature indicate that in the case of color vision, the nervous system is capable of responding to newly-added sensory input, allowing adult monkeys to respond to colors that they could not see previously. […] The prospect of ameliorating the problems caused by color blindness makes it an attractive future target for human gene therapy. […] The scientists said they are optimistic about the future possibility of gene therapy to cure colorblindness in humans.

• #84 Colour Vision Deficiency – Fighting Blindness incorporating The National League of the Blind

  https://www.fightingblindness.ie/living-with-sight-loss/eye-conditions/colour-blindness/

  Inherited colour vision deficiency is most common affecting both eyes. […] Some medications and chemicals have also been linked with this condition. […] Currently, there is no treatment for colour vision deficiency, but researchers are working to change this. […] Researchers are actively searching for ways to treat colour vision deficiency. […] Much of this effort has focused on developing gene therapies, although other therapeutic avenues have been investigated. […] There are clinical trials ongoing which are examining gene therapies for total colour vision deficiency. […] Gene therapy is a therapeutic approach which has proven safe in other retinal conditions. […] Using this technique, researchers have engineered small, safe viruses which aim to deliver the correct version of the gene of interest to the light sensing photoreceptor cells in the retina.

• #85 Prevalence of Color Blindness: Global and Regional Statistics

  https://www.visioncenter.org/resources/color-blind-statistics/

  A single mutated X in males is enough to cause CVD, whereas a female must inherit two mutated X chromosomes. […] Genetic research has identified numerous specific mutations, especially in the redgreen opsin gene cluster. […] Certain communities illustrate founder effects, where a once-rare gene became widespread due to population isolation. […] While color blindness does not typically threaten overall visual clarity, it can carry social and economic consequences when color discrimination is deemed essential. […] In some societies, the lack of systematic screening can result in late diagnoses, causing individuals to discover their condition only when it conflicts with a job requirement or a critical task. […] Perhaps the most promising frontier is gene therapy, which aims to insert functional color-vision genes into cone cells. […] Gene therapy is still experimental for most people with common redgreen deficiencies, but the advances so far point to a hopeful outlook in the coming years.

• #86 How Do Colorblindness Glasses Work? | Sharp HealthCare

  https://www.sharp.com/health-news/color-me-awestruck-how-colorblindness-glasses-work

  A person with complete colorblindness would not be helped by the glasses. […] Studies in people with a mix of types of colorblindness have only shown a limited benefit, with many people unable to tell any difference. […] While there is no treatment for congenital colorblindness, specialty glasses or contact lenses may help.

• #87 EnChroma Color Blind Glasses: How Do They Work?

  https://enchroma.com/pages/how-enchroma-glasses-work

  Most types of color blindness occur when there is an excessive overlap of the green and red color cones in the eye, causing distinct hues to become indistinguishable. […] EnChroma’s color blind lens technology selectively filters light to increase contrast between the red and green color signals to account for the overlap and alleviate symptoms of red-green color blindness for a richer, more colorful experience of the world. […] EnChroma develops optical lens technology that selectively filters out wavelengths of light at the point where this confusion or excessive overlap of color sensitivity occurs. […] A groundbreaking new study found EnChroma color blind glasses, which are engineered with technically advanced spectral notch filters, can enhance color vision for those with the most common types of color blindness.

• #88 EnChroma Color Blind Glasses: How Do They Work?

  https://enchroma.com/pages/how-enchroma-glasses-work

  Most types of color blindness occur when there is an excessive overlap of the green and red color cones in the eye, causing distinct hues to become indistinguishable. […] EnChroma’s color blind lens technology selectively filters light to increase contrast between the red and green color signals to account for the overlap and alleviate symptoms of red-green color blindness for a richer, more colorful experience of the world. […] EnChroma develops optical lens technology that selectively filters out wavelengths of light at the point where this confusion or excessive overlap of color sensitivity occurs. […] A groundbreaking new study found EnChroma color blind glasses, which are engineered with technically advanced spectral notch filters, can enhance color vision for those with the most common types of color blindness.

• #89 Understanding the History and Advancements of Color Blindness

  https://bondeye.com/advancements-color-blindness/

  In 1803 John Dalton was the first scientist to take academic interest in the subject of color blindness. […] Inherited color blindness happens when you dont have one of these types of cone cells or they dont work properly. […] Color blindness is usually genetic. The red/green and blue color blindness is usually passed down from the parents, the gene responsible for this is carried on the X chromosome. […] Nearly all people who are color blind can see colors but have difficulty distinguishing between certain colors. […] The X chrom lens is a monocular corneal contact lens which significantly enhances color perception for those with color deficiency. […] This does not cure vision problems it only aids in the perception of seeing colors.

• #90 Red-Green Color Blindness – All About Vision

  https://www.allaboutvision.com/conditions/color-blindness/red-green/

  Red-green color blindness thats inherited from parents is essentially fixed. It does not get better or worse over a persons lifetime. Other kinds of color deficiencies from injuries or diseases could get worse over time depending on a doctors success at treating those issues. […] Thus, red-green color blindness is not generally curable. Gene therapy may one day enable doctors to restore red-green vision its been done with monkeys in a lab but science hasnt figured out how to do the same for humans. […] Until then, products such as colorblind contacts or colorblind glasses may help filter the light waves reaching the retina. This can improve the ability to distinguish between some color hues, but it cant restore full color vision.

• #91 Colour Vision Deficiency: Definition, Causes, Symptoms, Diagnosis, and Treatment

  https://www.oscarwylee.com.au/glasses/eye/colour-vision-deficiency

  Colour vision deficiency or colour blindness cannot be prevented if it has been inherited from a parent, as this kind of colour vision deficiency is concerned with genes, and they cannot be altered. […] Colour blind glasses will not fix or cure colour blindness or colour vision deficiency but may help improve the way you see colour slightly.

• #92 What Are the Different Types of Color Blindness? 3 Types, Causes

  https://www.medicinenet.com/what_are_the_different_types_of_color_blindness/article.htm

  The different types of color blindness include red-green color blindness, blue-yellow color blindness, and complete color blindness. […] A person with normal color vision has trichromacy, which means a normal amount of all three cone types. […] Depending on the type of cones that are deficient, color blindness may be of the following different types: […] Color blindness is a common condition in which there is a decreased ability to see or differentiate between certain colors. This usually happens between shades of greens and reds and, occasionally, blues. […] Color blindness can be inherited (present at birth) or acquired (a result of the aging process, eye disease or injury, and certain medications). […] The most common cause is mutations in the OPN1LW, OPN1MW, and OPN1SW genes, which are inherited from parents. These mutations can cause faulty photopigments and impaired color vision. […] Currently, there are no medical treatments available for color blindness. […] Treatment of the underlying medical condition may help resolve color vision deficiencies.

• #93 Can a person develop color blindness later in life?

  https://www.medicalnewstoday.com/articles/can-you-develop-color-blindness

  Most individuals with color vision deficiency have had it since birth. However, people can develop it later in life. […] Color vision deficiency develops due to problems with the cone receptors at the back of the eye that detect the different frequencies of various colors. […] However, various health problems can damage either the cone receptors or the part of the brain that interprets color, meaning color vision deficiency may develop later on. Doctors refer to this as acquired color vision deficiency. […] Acquired color vision deficiency can occur as a result of damage to the eye or the area of the brain that interprets color. […] The symptoms of acquired color vision deficiency can change over time and might get worse or better. However, treating the underlying condition may resolve acquired color vision deficiency.

• #94 About Colour Blindness – Colour Blind Awareness

  https://www.colourblindawareness.org/colour-blindness/

  Colour (color) blindness (colour vision deficiency, or CVD) affects approximately 1 in 12 men (8%) and 1 in 200 women. […] There are different causes of colour blindness. For most colour blind people their condition is genetic, usually inherited from their mother, although some people become colour blind as a result of other diseases such as diabetes and multiple sclerosis or it can be acquired due to ageing or from taking drugs and medications. […] Problems can arise across the entire colour spectrum potentially affecting perception of all reds, greens, oranges, browns, purples, pinks and greys. Even black can be confused as dark red, dark green or dark blue/purple. […] The effects of colour vision deficiency can be mild, moderate or severe and people with severe forms often think that their condition is mild and doesnt really affect them. […] Statistically speaking most people with a moderate form of red/green colour blindness will only be able to identify accurately 5 or so coloured pencils from a standard box of 24 pencil crayons (although they may correctly guess more using their sub-conscious coping strategies).

• #95 Color vision deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/color-vision-deficiency/

  Color vision deficiency (sometimes called color blindness) represents a group of conditions that affect the perception of color. Red-green color vision defects are the most common form of color vision deficiency. Affected individuals have trouble distinguishing between some shades of red, yellow, and green. Blue-yellow color vision defects (also called tritan defects), which are rarer, cause problems with differentiating shades of blue and green and cause difficulty distinguishing dark blue from black. These two forms of color vision deficiency disrupt color perception but do not affect the sharpness of vision (visual acuity). […] Mutations in the OPN1LW, OPN1MW, and OPN1SW genes cause the forms of color vision deficiency described above. The proteins produced from these genes play essential roles in color vision.

• #96 Colour Blindness in Rugby | World Rugby

  https://www.world.rugby/organisation/accessibility/colour-blind/what-is-colour-blindness?lang=en

  Colour blind people can see clearly and in focus and can see some colours clearly, for example blue and yellow. […] Colour blindness can affect anyone involved in rugby, including spectators, players, match officials, coaches, pitch-side care providers, support staff and administrators, as well as people who work in supporting roles such as the emergency services, media, catering or sponsors. […] In a typical male squad of 32 players, statistically there will be two or three players with colour blindness. […] The personal testimonials throughout this document demonstrate that not all people with colour blindness have the same experiences in rugby and this is due to their type of colour blindness and how they are affected by specific circumstances, including lighting conditions.

• #97 Color vision deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/color-vision-deficiency/

  Genetic changes involving the OPN1LW or OPN1MW gene cause red-green color vision defects. These changes lead to an absence of L or M cones or to the production of abnormal opsin pigments in these cones that affect red-green color vision. Blue-yellow color vision defects result from mutations in the OPN1SW gene. These mutations lead to the premature destruction of S cones or the production of defective S cones. […] Blue cone monochromacy occurs when genetic changes affecting the OPN1LW and OPN1MW genes prevent both L and M cones from functioning normally. In people with this condition, only S cones are functional, which leads to reduced visual acuity and poor color vision. The loss of L and M cone function also underlies the other vision problems in people with blue cone monochromacy. […] Some problems with color vision are not caused by gene mutations. These nonhereditary conditions are described as acquired color vision deficiencies. They can be caused by other eye disorders, such as diseases involving the retina, the nerve that carries visual information from the eye to the brain (the optic nerve), or areas of the brain involved in processing visual information. Acquired color vision deficiencies can also be side effects of certain drugs, such as chloroquine (which is used to treat malaria), or result from exposure to particular chemicals, such as organic solvents.

• #98 Colorblindness-Achromatopsia 4 | Hereditary Ocular Diseases

  https://disorders.eyes.arizona.edu/handouts/colorblindness-achromatopsia-4

  The light sensitive cells in the retina are called rods (useful in dim vision) and cones (used for color vision). Gene mutations can impact either or both types. Those that cause a dysfunction in cones result in defective color vision of various types, sometimes called colorblindness or achromatopsia. […] This is a form of inherited colorblindness in which little or no color is perceived. At least 4 mutations cause achromatopsia and this one accounts for less than 2% of cases. […] Like other types of achromatopsia, patients with type 4 are born with poor vision and little or no color discrimination. […] The ERG (electroretinogram), an electrical test that measures retinal responses to light, reveals that the cones are nonfunctional while the rods function normally. […] This is considered to be a stationary disorder but a few patients have experienced a worsening of vision with age.

• #99 About Colour Blindness – Colour Blind Awareness

  https://www.colourblindawareness.org/colour-blindness/

  Colour (color) blindness (colour vision deficiency, or CVD) affects approximately 1 in 12 men (8%) and 1 in 200 women. […] There are different causes of colour blindness. For most colour blind people their condition is genetic, usually inherited from their mother, although some people become colour blind as a result of other diseases such as diabetes and multiple sclerosis or it can be acquired due to ageing or from taking drugs and medications. […] Problems can arise across the entire colour spectrum potentially affecting perception of all reds, greens, oranges, browns, purples, pinks and greys. Even black can be confused as dark red, dark green or dark blue/purple. […] The effects of colour vision deficiency can be mild, moderate or severe and people with severe forms often think that their condition is mild and doesnt really affect them. […] Statistically speaking most people with a moderate form of red/green colour blindness will only be able to identify accurately 5 or so coloured pencils from a standard box of 24 pencil crayons (although they may correctly guess more using their sub-conscious coping strategies).

• #100 Red-Green Color Blindness – All About Vision

  https://www.allaboutvision.com/conditions/color-blindness/red-green/

  Other causes can include: Eye injuries, Eye diseases such as glaucoma and macular degeneration, Cataracts, Nervous system diseases such as Parkinsons, Alzheimers and multiple sclerosis, Medications such as tiagabine (an anti-seizure drug) and Plaquenil (for rheumatoid arthritis and other autoimmune diseases), Environmental pollutants. […] Red-green color deficiencies come in four varieties based on how much of each color people perceive: Red-blind (protanopia) Red cant be seen, Green-blind (deuteranopia) Green cant be seen, Red-weak (protanomaly) Some red is visible; green and blue are normal, Green-weak (deuteranomaly) Some green is visible; red and blue are normal. […] Protanomaly means people have fewer cones for perceiving red. Deuteranomaly points to fewer cones to see green. These conditions cause slight to moderate differences in color perception.

• #101 Red-Green Color Blindness – All About Vision

  https://www.allaboutvision.com/conditions/color-blindness/red-green/

  Other causes can include: Eye injuries, Eye diseases such as glaucoma and macular degeneration, Cataracts, Nervous system diseases such as Parkinsons, Alzheimers and multiple sclerosis, Medications such as tiagabine (an anti-seizure drug) and Plaquenil (for rheumatoid arthritis and other autoimmune diseases), Environmental pollutants. […] Red-green color deficiencies come in four varieties based on how much of each color people perceive: Red-blind (protanopia) Red cant be seen, Green-blind (deuteranopia) Green cant be seen, Red-weak (protanomaly) Some red is visible; green and blue are normal, Green-weak (deuteranomaly) Some green is visible; red and blue are normal. […] Protanomaly means people have fewer cones for perceiving red. Deuteranomaly points to fewer cones to see green. These conditions cause slight to moderate differences in color perception.

• #102 Color vision deficiency: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/color-vision-deficiency/

  Color vision deficiency (sometimes called color blindness) represents a group of conditions that affect the perception of color. Red-green color vision defects are the most common form of color vision deficiency. Affected individuals have trouble distinguishing between some shades of red, yellow, and green. Blue-yellow color vision defects (also called tritan defects), which are rarer, cause problems with differentiating shades of blue and green and cause difficulty distinguishing dark blue from black. These two forms of color vision deficiency disrupt color perception but do not affect the sharpness of vision (visual acuity). […] Mutations in the OPN1LW, OPN1MW, and OPN1SW genes cause the forms of color vision deficiency described above. The proteins produced from these genes play essential roles in color vision.

• #103 Color Blindness: How It Happens and What Causes It

  https://www.webmd.com/eye-health/color-blindness

  Complete Color Blindness is also called monochromacy, you dont see any color at all and your vision may not be as clear. […] Rod monochromacy, also known as achromatopsia, is the most severe form of color blindness. None of your cone cells have photopigments that work. As a result, the world appears to you in black, white, and gray.

• #104 About Colour Blindness – Colour Blind Awareness

  https://www.colourblindawareness.org/colour-blindness/

  Colour (color) blindness (colour vision deficiency, or CVD) affects approximately 1 in 12 men (8%) and 1 in 200 women. […] There are different causes of colour blindness. For most colour blind people their condition is genetic, usually inherited from their mother, although some people become colour blind as a result of other diseases such as diabetes and multiple sclerosis or it can be acquired due to ageing or from taking drugs and medications. […] Problems can arise across the entire colour spectrum potentially affecting perception of all reds, greens, oranges, browns, purples, pinks and greys. Even black can be confused as dark red, dark green or dark blue/purple. […] The effects of colour vision deficiency can be mild, moderate or severe and people with severe forms often think that their condition is mild and doesnt really affect them. […] Statistically speaking most people with a moderate form of red/green colour blindness will only be able to identify accurately 5 or so coloured pencils from a standard box of 24 pencil crayons (although they may correctly guess more using their sub-conscious coping strategies).

• #105 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Diagnosis of color blindness is usually done with a color vision test, such as the Ishihara test. There is no cure for most causes of color blindness; however, there is ongoing research into gene therapy for some severe conditions causing color blindness. Minor forms of color blindness do not significantly affect daily life and the color blind automatically develop adaptations and coping mechanisms to compensate for the deficiency. However, diagnosis may allow an individual, or their parents/teachers, to actively accommodate the condition. […] Color blindness is any deviation of color vision from normal trichromatic color vision that produces a reduced gamut. Mechanisms for color blindness are related to the functionality of cone cells, and often to the expression of photopsins, the photopigments that 'catch’ photons and thereby convert light into chemical signals. Color vision deficiencies can be classified as inherited or acquired.

• #106 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Diagnosis of color blindness is usually done with a color vision test, such as the Ishihara test. There is no cure for most causes of color blindness; however, there is ongoing research into gene therapy for some severe conditions causing color blindness. Minor forms of color blindness do not significantly affect daily life and the color blind automatically develop adaptations and coping mechanisms to compensate for the deficiency. However, diagnosis may allow an individual, or their parents/teachers, to actively accommodate the condition. […] Color blindness is any deviation of color vision from normal trichromatic color vision that produces a reduced gamut. Mechanisms for color blindness are related to the functionality of cone cells, and often to the expression of photopsins, the photopigments that 'catch’ photons and thereby convert light into chemical signals. Color vision deficiencies can be classified as inherited or acquired.

• #107 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Diagnosis of color blindness is usually done with a color vision test, such as the Ishihara test. There is no cure for most causes of color blindness; however, there is ongoing research into gene therapy for some severe conditions causing color blindness. Minor forms of color blindness do not significantly affect daily life and the color blind automatically develop adaptations and coping mechanisms to compensate for the deficiency. However, diagnosis may allow an individual, or their parents/teachers, to actively accommodate the condition. […] Color blindness is any deviation of color vision from normal trichromatic color vision that produces a reduced gamut. Mechanisms for color blindness are related to the functionality of cone cells, and often to the expression of photopsins, the photopigments that 'catch’ photons and thereby convert light into chemical signals. Color vision deficiencies can be classified as inherited or acquired.

• #108 Color blindness – Wikipedia

  https://en.wikipedia.org/wiki/Color_blindness

  Diagnosis of color blindness is usually done with a color vision test, such as the Ishihara test. There is no cure for most causes of color blindness; however, there is ongoing research into gene therapy for some severe conditions causing color blindness. Minor forms of color blindness do not significantly affect daily life and the color blind automatically develop adaptations and coping mechanisms to compensate for the deficiency. However, diagnosis may allow an individual, or their parents/teachers, to actively accommodate the condition. […] Color blindness is any deviation of color vision from normal trichromatic color vision that produces a reduced gamut. Mechanisms for color blindness are related to the functionality of cone cells, and often to the expression of photopsins, the photopigments that 'catch’ photons and thereby convert light into chemical signals. Color vision deficiencies can be classified as inherited or acquired.

• #109 Colour Vision Deficiency or Colour Blindness – Eyescreen™

  https://eyescreen.cordlifetech.com/sg/colour-vision-deficiency-or-colour-blindness

  Early detection is the key to overcome limitations created by colour vision deficiency. Colour vision deficiency may not be life-threatening but it does affect the quality of life. Some patients may suffer from its long-term consequences, as they may be mistaken as slow-learners in school or being uncooperative during play. All these could lead to poor self-esteem and symptoms of social withdrawal in children. […] The most common colour vision test is performed using the Ishihara chart. […] Cordlife has introduced the Colour Vision Testing Made Easy colour plates. This test is being considered as the gold standard for diagnosis of colour vision deficiency especially in paediatrics.

• #110 Caucasian Boys Show Highest Prevalence of Color Blindness Among Preschoolers | ScienceDaily

  https://www.sciencedaily.com/releases/2014/04/140403084243.htm

  The most common form of color blindness is genetic and involves a mutation or lack of genes that help the eye see red or green. […] People with this form of color blindness cannot tell the difference between the two colors. […] Early diagnosis of color deficiency is important so that parents and teachers of color blind children are aware and able to provide adaptive learning tools and strategies for these children. […] Children with color blindness can benefit from different kinds of lesson plans or homework to demonstrate their understanding of concepts despite their inability to see colors correctly.

• #111 Color vision deficiency | AOA

  https://www.aoa.org/healthy-eyes/eye-and-vision-conditions/color-vision-deficiency

  In many cases, genetics cause color deficiency. About 8% of white males are born with some degree of color deficiency. Women are typically just carriers of the color-deficient gene, though approximately 0.5% of women have color vision deficiency. The severity of inherited color vision deficiency generally remains constant throughout life and does not lead to additional vision loss or blindness. […] Color deficiency can be diagnosed through a comprehensive eye examination. […] There is no cure for inherited color deficiency. But if the cause is an illness or eye injury, treating these conditions may improve color vision.

• #112 Pathophysiology and pharmacological study of colour blindness | International Journal of Research in Pharmacology & Pharmacotherapeutics

  https://ijrpp.com/ijrpp/article/view/495

  Color blindness occurs when the person is unable to see colors in a normal way. It is also known as colour deficiency. In Trichromacy, three types of cones are present and working properly. Patient can see all colors on the visible spectrum of light in the traditional way. This is full colour vision. In Anomalous trichromacy. There are three types of cones, but one type isnt as sensitive to light in its wavelength as it should be. As a result, person doesnt see colors in the traditional way, with variations from normal ranging from mild to severe. In Dichromacy, one type of cone is missing. So, only two types of cones (usually S cones along with either L cones or M cones) are present. In Monochromacy: Person has only one type of cone or no cone function at all, so very limited or no ability to see color. There are four main subtypes: a.Protanopia: In this condition, in the person L cones are missing. So, person cant perceive red light. Mostly see colors as shades of blue or gold. b.Deuteranopia: In this condition, in the person M cones are missing. So, person cant perceive green light. Mostly see blues and golds. c.Protanomaly: In this condition, the person has all three cone types, but L cones are less sensitive to red light than they should be. Red may appear as dark gray, and every color that contains red may be less bright. d.Deuteranomaly: In this condition, the person has all three cone types, but M cones are less sensitive to green light than they should be. Mostly see blues, yellows and generally muted colours. The colour blindness can be diagnosed by the Ishihara test, Colour vision test. Colour vision tests and Genetic testing.

• #113 Appropriate terminology in the nomenclature of the color vision deficiency

  https://www.oatext.com/appropriate-terminology-in-the-nomenclature-of-the-color-vision-deficiency.php

  The colour vision deficiencies (CVDs) are visual disorders occuring in the absence or abnormal function of one or more cones. […] Although the term Color blindness has been used to describe CVDs, it is actually a wrong term for nomenclature. […] It seems that color vision deficiency sould be correct term for this disorder because color blindness means the absence of the ability to detect or distinguish any color. […] The colour vision deficiency (CVD) occurs in the absence or abnormal function of one or more cones. […] Color blindness is a term which has been used to describe the CVDs. However, it is wrong nomenclature. Correct term should be color vision deficiency (CVD). Because, the term color blindness means the absence of the ability to detect or distinguish any color. […] Color vision deficiencies are mainly divided into two groups as hereditary and acquired CVDs.

• #114 Colour Vision Deficiency or Colour Blindness – Eyescreen™

  https://eyescreen.cordlifetech.com/sg/colour-vision-deficiency-or-colour-blindness

  Early detection is the key to overcome limitations created by colour vision deficiency. Colour vision deficiency may not be life-threatening but it does affect the quality of life. Some patients may suffer from its long-term consequences, as they may be mistaken as slow-learners in school or being uncooperative during play. All these could lead to poor self-esteem and symptoms of social withdrawal in children. […] The most common colour vision test is performed using the Ishihara chart. […] Cordlife has introduced the Colour Vision Testing Made Easy colour plates. This test is being considered as the gold standard for diagnosis of colour vision deficiency especially in paediatrics.

• #115 The Importance of Driving Awareness of Color Blindness

  https://newsroom.thecignagroup.com/importance-driving-awareness-color-blindness

  The time is now for employers to raise awareness of the limitations and experiences faced by people with color blindness. Greater awareness and education will create more empathy among colleagues, a better employee experience, and more inclusive and accessible marketing, communications, and customer experiences.

• #116 The Importance of Driving Awareness of Color Blindness

  https://newsroom.thecignagroup.com/importance-driving-awareness-color-blindness

  About 300 million people worldwide have color blindness (also known as color vision deficiency). One in 12 men (8%) and 1 in 200 women (0.5%) are color blind, which can have an impact on their education, grades, career choice, and even career growth, as well as how they see and engage with visuals such as charts, photographs, and presentations. […] The primary cause of color blindness is a lack of light-sensitive pigments in the cones of the eye. Color blindness is genetically passed on through the X chromosome. However, diseases such as diabetes can affect color vision, as can aging. […] Although genetically caused color blindness cannot be cured, visual aids and other strategies can help. In addition, some people may benefit from special contact lenses or glasses. […] Potential safety issues associated with color blindness can restrict career choices. An electrician may have difficulty matching color-coded wires; drivers may have trouble identifying the colors of traffic lights.

• #117 The Importance of Driving Awareness of Color Blindness

  https://newsroom.thecignagroup.com/importance-driving-awareness-color-blindness

  About 300 million people worldwide have color blindness (also known as color vision deficiency). One in 12 men (8%) and 1 in 200 women (0.5%) are color blind, which can have an impact on their education, grades, career choice, and even career growth, as well as how they see and engage with visuals such as charts, photographs, and presentations. […] The primary cause of color blindness is a lack of light-sensitive pigments in the cones of the eye. Color blindness is genetically passed on through the X chromosome. However, diseases such as diabetes can affect color vision, as can aging. […] Although genetically caused color blindness cannot be cured, visual aids and other strategies can help. In addition, some people may benefit from special contact lenses or glasses. […] Potential safety issues associated with color blindness can restrict career choices. An electrician may have difficulty matching color-coded wires; drivers may have trouble identifying the colors of traffic lights.

• #118 The Importance of Driving Awareness of Color Blindness

  https://newsroom.thecignagroup.com/importance-driving-awareness-color-blindness

  The time is now for employers to raise awareness of the limitations and experiences faced by people with color blindness. Greater awareness and education will create more empathy among colleagues, a better employee experience, and more inclusive and accessible marketing, communications, and customer experiences.

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