color blindness

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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.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.)

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

color blindness

[′kəl·ər ‚blīnd·nəs]
Inability to perceive one or more colors.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Neville refers to the modem-day notion of color-blindness as the idea that "race should not and does not matter" (Neville, 2000, p.
Loury's principal goal, which appears to be legitimizing race-conscious public policies, rests on the interrelated arguments that blacks are not essentially inferior to others, that perceptions of inferiority (e.g., a tendency to criminality) can distort and exacerbate the situation, and that liberal individualism and color-blindness are insufficient to meet the challenge.
The color-blindness mutation of people on Pingelap is found on chromosome 8.
The first centers on the fact that when Congress moved to address the problem of employment discrimination against blacks, instead of using race for blacks instead of against them, the response was a call for color-blindness. According to Skrentny, the irony is that our society is full of exemptions to the difference-blindness rule in general (senior citizen discounts) and in employment (veteran preferences, nepotism), but when dealing with the question of race, preferences are absolutely taboo.
Affirmative action supporters counter that color-blindness is a goal, not a means.
The author explores how Mandela and Mbeki have been represented in popular culture over the course of their political careers, assessing the representations in terms of such key themes as national reconciliation, national unity, color-blindness, pragmatism, tradition, national consensus, African nationalism, race, class, coloniality, and post-coloniality.
In tests on five men with red-green color-blindness, the researchers pitted two types of visual-receptor cells against each other, they report in the April 8 Nature.