Colorblindness is typically a genetic condition, and it is much more common in men than in women. Approximately one in 12 men has at least some color perception problems. Less common, acquired deficiencies stem from injury, disease, or the aging process. How do things look?
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Tests for color blindness - Ishihara
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Information about colorblindness - color deficiency - what it is, why it happens, how it works, problems
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Color blindness may be a hereditary condition or caused by disease of the optic nerve or retina.
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You might think being color-blind means you can"t see any colors. But that"s not true. Find out more in this article for kids.
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Adres: http://www.kidshealth.org/kid/talk/qa/color_blind.html

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