do color-blind ppl exist?

Question

ok,im doing a novel and need to know if they really exist and its not just fiction,if so,what causes it? Where can I get information on this illness?Is there a cure? thanx

Answer 1

8 % if European & American males have it. Its not a myth. There is no cure.

Answer 2

To add to the above:
True black and white colour blindness is very rare and usually, but not always, associated with poor general vision.

The majority of people with colour vision defects have the milder versions, and only have difficulty with a limited range of colours, particulalarly when they are de-saturated (pastel , or near-white) tones.
About one man in fifty is judging traffic lights by their position on the pole, not by their colour (an example of double-coding: the lights are giving information two different ways: *red* lit means stop, but so does *top* lit.)
Some colours, particularly blue and yellow, are almost always safe and easily discriminated even if others are likely to be confused.

There is no cure but there are tricks and artificial devices which increase the ability to discriminate colour in particular circumstances for some people.
The momentary (but not permanent) use of a coloured filter, for example, will allow discrimination between a red and green object.
The use of the X-chrom contact lens and related devices also increases discrimination in some individuals, but does not create "normal colour vision."

I have to say that I'm a little worried about your novel, given that your question contains at least eight infelicities or errors of English.
I'm reluctant to say this, but someone has to, like informing your best friend about her breath. You may not get thanked, but it's the right thing to do.

Answer 3

Yes, color blindness does exist. I have a friend in college who could not distinguish red and green.

Color blindness (color vision deficiency) is a condition in which certain colors cannot be distinguished, and is most commonly due to an inherited condition. Red/Green color blindness is by far the most common form, about 99%, and causes problems in distinguishing reds and greens. Another color deficiency Blue/Yellow also exists, but is rare and there is no commonly available test for it.

Answer 4

Yes, color-blind people exist, but it is rare.

The genes for it are on the X chromosome, so since men only have one of those, it is much more common for a man to be color blind than a woman. A woman who carries the gene might see less vivid color, but chances are she will not even notice.

A person (again, more commonly a man) can be completely color blind, or could only have difficulty with some colors. Red/green is the most common. It is pretty easy to tell if your child is color blind as soon as you start teaching them the colors, if your son is not able to tell if a toy is red or green by age three, he could be red/green color blind and you can go check with his pediatrician.

Answer 5

carlito is exactly correct. its very common in males...nearly 10% of the population, but VERY UNCOMMON in females. its a genetic disorder:

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

the reason its uncommon in females is b/c the color blindness genetic defect occurs on the X chromosome. males only have 1 X (they're XY), so if their X is defective, the colorblindness will be "expressed". females have 2 X's, so they'd have to have 2 defective X's in order to express the defect.

no cure.

a color deficient person can use a special type of tinted contact lenses, where one lens in one eye is tinted a different color than the other lens in the other eye...and with a little practice and training they can close one eye at a time and compare the images. using this method they can distinguish between red & green, but its still a totally different "red" and "green" than we see. the contacts do not make them un-colorblind...they just help with jobs/professions where they need to distinguish colors, but are unable to do so b/c of their genetic color deficiency.

the contacts i'm referring to are expensive and specially designed for this purpose. they are not just regular "colored contacts".

my oldest son is reg/green color deficient.

Answer 6

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Answer 7

it is pretty rare to have someone who actually sees in black and white, however people who confuse colors are relatively common. it is hereditary, so it is usually seen in males.

Answer 8

my friend is colour blind and he finds it relli difficult to see what colour is what. its hard to imagin life with out all the colours