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Doctor insights on: Color Blindness Karyotype

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What is the rate of occurrence of color blindness in the u.S.?

What is the rate of occurrence of color blindness in the u.S.?

About 8%: The standard statistics for inherited color deficiency is about 7.5% in males and 1/2 % in females. This can vary somewhat with different racial groups. The degree of color deficiency and the type are variable so your ophthalmologist can test you and see in which category you are if that is important to you and also give you information about your family possibilities. ...Read more

Dr. David Chandler
78 Doctors shared insights

Color Blind (Definition)

Ophthalmologist prefer to use the term color deficit as blindness conveys other meanings. Lowered color perception can be inherited (many forms), can result from advanced loss of retinal cells, inherited retinal disease, and some forms occur due to CNS injury. There are excellent tests for the various types and they can be functionally ...Read more


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Is it common to develop color blindness in your mid 20's?

Is it common to develop color blindness in your mid 20's?

Rare: Color deficiency is inherited at birth. A few global diseases of the retina and rare strokes of the brain can affect color vision in an adult, but these are rare. ...Read more

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Effects of being color blind?

Effects of being color blind?

Minor: Depending upon the degree of your deficiency, you will be able to function for most activities (for instance traffic lights are a color designed to be seen by the color deficient). Occupations with issues for you: painter, fruit grader, electronic assembly worker, gemology, appraiser, artist. Legal restrictions for police work, pilots, boat captains. ...Read more

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What makes a person color blind?

What makes a person color blind?

Genetics: Several genes are responsible for allowing our retinas' receptors to record the different colors we see. Occasionally, someone develops a mutation that prevents some of the colors to be recorded. This makes differentiating certain shades or colors difficult. ...Read more

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Is there any way to be sure if I'm color blind or not?

Is there any way to be sure if I'm color blind or not?

Test your color sigh: You can get a clue by using a test chart. The following link will help. The colors are not perfect in internet charts but are a pretty good clue: > Copy and paste this on your url line to get to the test plates. There are many others on line. ...Read more

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What is color blindness?

Color blindness: Color blindness is a congenital or acquired condition whereby a person cannot see certain colors well because the parts of the eye that receive those wavelengths of light do not function well. For example, some people are born with red=green color blindness. They cannot see the color red or green well. Those colors would look gray or "washed out". Special tests can determine color blindness. ...Read more

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Is color blindness common?

Sort of: About 8% of males and 1% of females have some degree of color perception dysfunction. So it is sort of common but not the majority. It is inherited so the family connection is important and can be traced. ...Read more

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What is color blindness?

Color blindness: Color blindness is the inability to see certain colors adequately. This is an inherited condition (x-linked recessive) that affects men much more than women. The defect is in the retina and involves a problem with color sense in pigment granules. The commonest affect is trouble distinguishing red from green. See your doctor for an examination and proper treatment. ...Read more

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What causes color blindness?

What causes color blindness?

Mostly genertic: In inherited color deficiency, a visual pigment has its spectrum of color reception altered to a small degree and to a large degree in those with high degree of this disorder. The photoreceptor count is the same, so the acuity is not lost - just the color recognition. There are a few less common color vision losses due to advanced retinal, optic nerve and CNS diseases. ...Read more

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How is color blindness treated?

How is color blindness treated?

Not possible: Most color blindness is inherited and permanent. A few are acquired from retinal global disease or a few rare strokes in the brain. No treatment is possible. ...Read more

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Is color blindness reversible?

May be: There two main kind of color blindness one genetic in nature and the other acquired, the genetic one is not revisable, the second in some cases it is. ...Read more

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Color blindness, is this normal?

Color blindness, is this normal?

Not quite: It is "normal" for those who have it. For those with actual normal color vision, it would be abnormal to lose it. ...Read more

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Can I correct my color blindness?

No: I assume you have inherited color deficiency. This is a permanent change in the pigments of your light receptors altering the light detection spectrum. This cannot be improved. The use of a red contact lense is suggested as an improvement, but this merely shifts the axis of the defect to another direction to allow passage of color detection plates but leavers you color blind in new direction. ...Read more

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How is color blindness inherited?

Sex linked: The most common form is carried on the X chromosome and so it manifests more commonly by far in males who lack a corresponding X (as women do) to compensate (males have a sort Y chromosome). It is therefore passed on to a male child from his mother who carries a defective X (and most likely a normal X matching it so she is not color deficient.). ...Read more

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Do color blind people lack cones?

Do color blind people lack cones?

No: Color blind people have a set of rhodopsin light receptive pigments that are shifted in spectrum, giving a narrower range of color perception. Except for a few very rare forms, they have a normal cone count and so their acuity is normal. ...Read more

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Who is at risk for color blindness?

Males: Color blindness is most commonly a genetic condition. It is usually sex linked, and more common in males. Therefore males with a family history of color blindness would be at higher risk. ...Read more

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What's ishihara color blindness test?

What's ishihara color blindness test?

Color plates: The ishihara test plates are a series of dots of various colors with an embedded number or symbol which cannot be easily seen by the color deficient due to color confusion. They are the most commonly available test in ophthalmologists office although others are also available and some are better at separating the forms of color deficiency out. Ishihara is a good screening test. ...Read more

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How does color blindness be acquired?

Retina, optic nerve: Traditional color blindness is inherited, with 8% of men being red/green color blind. Acquired color blindness can be from any condition that affects the macula (macular degeneration and others) or the optic nerve (optic neuritis, or optic nerve atrophy). This is not red/green, but often the color red is poorly seen. Cataracts can filter out the color blue and cause yellowish vision. ...Read more

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How does one contract color blindness?

How does one contract color blindness?

Eye'veGotYouCovered: You don't contract it, you inherit it. It's a mostly genetic disorder. Color blindness is a usually a genetic (hereditary)condition (you are born with it).Red/green and blue color blindness is usually passed down from your parents. The responsible gene is carried on the X chromosome, the reason why many more men are affected. Non-genetic causes can be rare diseases that affect the eye and brain nerves. ...Read more

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How do you pass a color blindness test?

Color blindness: You either look an images or put a set of colors in order. ...Read more

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What sort of disease is color blindness?

Color vision anomaly: Color blindness is a misnomer, as most color blind people see some colors, they just see the hues differently than the norm. This can be an advantage if looking at camoflage. Our cone cells come in three types to see red, blue and yellow, and the receptors in color vision defect patients are either lacking or at lower levels than i. ...Read more

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Explain the symptoms of color blindness?

Explain the symptoms of color blindness?

Color blindnes: A color blind person does not know of his problem until he compares himself with others. The visual acuity is usually normal. Color recognition is diminished along the axis of confusion for the type of deficiency. If you have this you could not be employed in color dependent occupations such as microcomponent assembly or fruit grading. ...Read more

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Will color blindness get worse with age?

Not typically: Color blindness is typically a genetically inherited problem. However there are certain eye disease which affect the macula or optic nerve that can result in certain types of color vision deficits. In addition, cataracts can result in a dulling of colors. ...Read more

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What are the symptoms of color blindness?

Color mistakes: Color blindness (we call it deficiency) causes failure to distinguish colors along certain patterns of confusion. So a red-green deficient person cannot make that distinction between objects of those shades. From a practical standpoint, color deficiency is a bar to certain occupations such as fruit grader, electronics assembly, some law enforcement jobs, certain types of painting, etc. ...Read more

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What is the frequency of color blindness?

What is the frequency of color blindness?

See below: Congenital color blindness is much more common in males since some (the red and green) of the color photopigments are on the x-chromosome (men only have one [xy] while women have two [xx]). Less than 10% of the population has any form of color blindness (there are several types). Acquired color blindness can be due to macular, optic nerve, or brain disease/trauma. ...Read more

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What is the occurrence of color blindness?

What is the occurrence of color blindness?

8% males 1/2% fem: Color deficiency is mostly an inherited defect of the light receptors with a strong sex linking. Therefore much more common in males. Some cases of lowered color deficiency can occur in global retinal losses such as advancing diabetes and there are a few rare central nervous system color deficiencies as reported by oliver sacks. ...Read more

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Mention the 15 facts about color blindness?

Mention the 15 facts about color blindness?

Is it a quiz: I like your post - color vision deficiencies can be classified as acquired or inherited, color blindness may be described as total or partial, may be regarded as possibly having some advantage over the long term, such as better discrimination of color camouflaged objects especially in low-light conditions, pertains to the cone photoreceptors in retinas, brain or retinal damage by shaken baby syndr. ...Read more

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What are early symptoms of color blindness?

The same: Inherited color blindness does not have early symptoms but is the same throughout life. It becomes known when the color deficient person compares his recognition with others. Color blindness can also occur with advancing retinal pathology like untreated diabetic retinopathy and rarely brain stroke issues. ...Read more

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How do you know if you have color blindness?

Testing: See your eye doctor. They have simple tests which can determine if there is any color vision disorder. ...Read more

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What does color blindness does to your body?

What does color blindness does to your body?

Nothing: This is a local problem within the eye and brain dealing with perception of color. It does not connect or interact with any other part of the body and cannot cause a problem anywhere else. ...Read more

Dr. Damien Luviano
64 Doctors shared insights

Blindness (Definition)

Vision impairment and blindness are conditions in which a person cannot see well or see at all, even with glasses or contact lenses. If a person's best vision (with correction) out of either eye is only 20/70 - 20/200, he is impaired. If he can see no better than 20/200 or his visual field is no more than 20 degrees (severe "tunnel" vision), ...Read more


Dr. Tim Conrad
443 Doctors shared insights

Loss Of Vision (Definition)

Loss of vision reflects the inability to perceive images. Such a phenotype can be due to occlusive or barriers to light (e.g. cataracts) through retinal alterations (e.g. wet macular degeneration) to optic nerve lesions (e.g. from a pituitary adenoma) to central nervous system ...Read more