chromatopsia

chromatopsia /chro·ma·top·sia/ (kro″mah-top´se-ah) a visual defect in which colorless objects appear to be tinged with color.

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chro·ma·top·si·a (krm-tps-)

n.

A condition in which objects appear to be abnormally colored or tinged with color. Also called chromatic vision.

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chromatopsia

[krō′mətop′sē·ə]

Etymology: Gk, chroma + opsis, vision

1 an abnormal visual condition that makes colorless objects appear tinged with color.

2 a form of color blindness characterized by the imperfect perception of various colors. It may be caused by a deficiency in one or more of the retinal cones or by defective nerve circuits that convey color-associated impulses to the cerebral cortex. The most common defect in color sense is the inability to distinguish red from green, a defect evident in about 10% of men and 1% of women. Compare chromesthesia.

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chromatopsia [kro″mah-top´se-ah]

a visual defect in which colored objects appear unnaturally colored and colorless objects appear tinged with color. The chromatopsias are named for the colors seen: cyanopsia, blue; chloropsia, green; erythropsia, red; xanthopsia, yellow. Chromatopsia may be caused by drugs, disturbance of the optic centers, cataract extraction, or dazzling light.

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chromatopsia 

Abnormal condition in which objects appear falsely coloured. Depending upon the colour seen, the chromatopsia is called xanthopsia (yellow vision), erythropsia (red vision), chloropsia (green vision) or cyanopsia (blue vision). This condition may appear after a cataract operation (blue and red vision) or following exposure to an intense illumination (red vision) or in people suffering from carbon monoxide poisoning and oxygen deprivation. This may cause some damage to the areas of the visual cortex involved in the processing of colour perception, because these areas are supplied with more blood vessels than other areas of the visual cortex. Syn. chromopsia. See euchromatopsia; xanthopsia.