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.

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]
(medicine)
Inability to perceive one or more colors.
References in periodicals archive ?
The league responded with an apology and vowed to avoid a repeat of the incident in the future, considering colourblind viewers with their colour rush uniform designs by consulting an expert.
e hard work was worth it, because e Colourblind Chameleon has already proved a hit with children and their parents.
It spawned the chart-topping single Colourblind and he went on to have four more hits.
"We believe there is a gap in the market with many games currently available produced from a western perspective," said Riz Khan, one of the founders of Colourblind, in a release.
Explaining the product Mr Walsh told OT: "The Huetility Colourblind Simulator iPhone application is intended for people who know someone who is colourblind and want to better understand how he or she perceives co[our.
The public just couldn't get enough of the grinning 22-year-old and showed him just what they thought when he released Colourblind.
Director Michael Emans adds another dimension with colourblind casting in this production.
Despite obstacles such as being colourblind and no experience of the art world he forged ahead, using his substantial sales experience.
The schoolgirl from Kinmel Bay suffers from achromatopsia, a rare genetic condition that leaves her completely colourblind.
Gentle, charming and enchanting, White is a must-see - for the colourblind or otherwise.
Without their specially tinted glasses, the boys are blinded by daylight and are colourblind, with their vision only reaching as far ahead as two metres.
(Michael's a colourblind electrician, but that's another story).