color blindness

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Related to color blindness: Color blindness test

color blindness,

visual defect resulting in the inability to distinguish colors. About 8% of men and 0.5% of women experience some difficulty in color perception. Color blindness is usually an inherited sex-linked characteristic, transmitted through, but recessive in, females. Acquired color blindness results from certain degenerative diseases of the eyes. Most of those with defective color vision are only partially color-blind to red and green, i.e., they have a limited ability to distinguish reddish and greenish shades. Those who are completely color-blind to red and green see both colors as a shade of yellow. Completely color-blind individuals can recognize only black, white, and shades of gray. Color blindness is usually not related to visual acuity; it is significant, therefore, only when persons who suffer from it seek employment in occupations where color recognition is important, such as airline pilots, railroad engineers, and others who must recognize red and green traffic signals. Tests for color blindness include identifying partially concealed figures or patterns from a mass of colored dots and matching skeins of wool or enameled chips of various colors.

Color Blindness


the inability to distinguish colors. Total color blindness (monochromatism), in which no color differences can be distinguished, is rare. (SeeDALTONISM for a discussion of partial color blindness.)

color blindness

[′kəl·ər ‚blīnd·nəs]
Inability to perceive one or more colors.
References in periodicals archive ?
Besides frankly challenging racism, color blindness and cultural incompetence, Dr.
12) However, the tendency of color blindness to narrowly define racism exclusively in terms of conscious prejudice disguises the pervasive influence of unconscious and institutional racism--two concepts that will be explained at length as this Article proceeds.
In a subsequent study, 3 of 32 children exposed in utero to solvents throughout pregnancy had color blindness in the absence of a family history of the disorder.
It is quite possible that color blindness led several members of the Eugene City Council to initially overlook the importance to African Americans of renaming the road, as well as to many other community groups.
This technology stands to be truly life-changing for those who suffer with visual reading disorders often associated with dyslexia or who live with color blindness.
We are pleased that those with color blindness will be able to see more colors in each exhibit when they visit the Newseum.
Milner (education, Peabody College of Vanderbilt College) argues that teachers must reject color blindness and instead acknowledge how race operates on individual and systemic levels in education and in the classroom.
Indeed, scientists have noted that red-green color blindness is much more prevalent in people than in chimpanzees and other Old World primates.
Having concluded that the appeal to color blindness is a dangerous distraction from the lingering effects of prejudice; Loury calls for major structural remedies to speed up progress toward racial equality.
Yet, I must confess to a certain color blindness where flowers of garden plants are concerned.
The initial symptoms of optic neuritis may include blurred vision, color blindness, pain behind the eye when it is moved, blind spots in the field of vision, or difficulty in seeing objects with poor contrast.
But the color blindness he enjoyed in Germany may have been based less on an absence of racist attitude than on a lack of opportunity to vent it.