colorblindness The inability to perceive colors in a normal fashion. The most common forms of colorblindness are inherited as sex-linked (Xlinked) recessive traits. Females are carriers and males are affected. As a result, approximately 1 in 8 males is colorblind, compared to fewer than 1 in 100 females. The most common form of colorblindness is red–green. The second most common form is blue–yellow. The most severe form of colorblindness is achromatopsia, the inability to see any color. Testing for colorblindness is commonly performed along with other types of vision screening. See also monochromatism.
