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]
Inability to perceive one or more colors.
References in periodicals archive ?
Spectral Edge reports that in a trial of 90 people, 60 of whom had some form of colour blindness (including 40 deuteranopes), 93% of participants found watching processed videos "perfectly acceptable," enabling colour blind and non-colour blind viewers to watch content together on the same screen.
Some people might perceive being colour blind as a very mild disability, especially for an artist, but I never have.
2) Colour blind men inherit the condition through the maternal line.
Jefferson is currently developing software that can be used as a plug-in to a colour blind person's computer to adjust the colours according to their type of colour blindness.
I like Jon Snow but taking sartorial advice from a man who is quite clearly colour blind is like asking a lemming for directions'' - Jeremy Paxman hits back at the Channel 4 newsreader - famous for his garish ties - over his criticism of Paxman's failure to wear a tie.
Our first thought was that the painter was colour blind.
A DRUNKEN horse and trap driver who ran a red light tried to claim it was the animal's fault - as it was colour blind.
Washington, Jan 19 (ANI): A new study from the University of Western Australia and the University of Queensland in Australia has suggested that sharks are colour blind.
The finding is also likely to intrigue millions of people around the world who are colour blind - including about 3.
Colour blind animals confuse the stripes with tall grass in the savannah.
Every parent and teacher has a moral duty to educate our kids to be colour blind.
Watching these grossly overpaid individuals, who have not mastered the basic skills of playing football as a team, could be likened to a sign writer who can't spell or an artist who is colour blind.