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单词 daltonism
释义

daltonism


dal·ton·ism

also Dal·ton·ism D0014100 (dôl′tə-nĭz′əm)n. An inherited defect in perception of red and green; red-green colorblindness.
[After John Dalton.]
dal·to′ni·an (-tō′nē-ən), dal·ton′ic (-tŏn′ĭk) adj.

daltonism

(ˈdɔːltəˌnɪzəm) n (Medicine) colour blindness, esp the confusion of red and green[C19: from French daltonisme, after John Dalton] daltonic adj

Daltonism

red-green color blindness.See also: Color, Eyes
Thesaurus
Noun1.Daltonism - dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-reddeuteranopia, green-blindnessred-green color blindness, red-green colour blindness, red-green dichromacy - confusion of red and green
Translations
daltonismeдальтонизм

Daltonism


Daltonism

 

partial color blindness, one of the forms of color vision disturbance. Daltonism was first described in 1794 by J. Dalton, who himself suffered from this condition.

Daltonism is found in 8 percent of all males and 0.5 percent of all females. It is postulated that there are three elements in the retina, each of which is sensitive to only one of the three basic colors (red, green, and blue-violet). Various mixtures of these basic colors produce all shades perceived by the normal eye. This is normal, so-called trichromatic color perception. When one of these three elements is lacking, partial color blindness, or dichromatism, results. Persons suffering from dichromatism distinguish colors mainly by their brightness; qualitatively they are capable of merely distinguishing the “warm” tones of the spectrum (red, orange, and yellow) from the “cold” tones (green, blue, and violet). Among di-chromats one may distinguish between those with red blindness (protanopia), in whom the perceived spectrum is shortened at the red end, and those with green blindness (deuteranopia). In protanopia (Daltonism proper), red is perceived as being darker, and is confused with dark-green and dark-brown; while green is confused with light-gray, light-yellow, and light-brown. In deuteranopia green is confused with light-orange and light-pink, while red is confused with light-green and light-brown. Blue blindness, or tritanopia, is found extremely rarely and has no practical significance. In tritanopia all colors of the spectrum are represented as shades of red or green. In some cases there is simply a weakening of color perception—protanomaly (weakening of red perception) and deuteranomaly (weakening of green perception). All forms of congenital color blindness are hereditary. Women are carriers of this pathological inheritance; they themselves retain normal vision and are color blind only when they have a color-blind father and a mother who is at least heterozygous for that gene.

Acquired disturbances of color vision may arise with various diseases of the eyes and the central nervous system; one or both eyes may be affected and often for all the basic colors. Disturbances of color vision are diagnosed by means of special tables or spectral instruments. Testing of color vision is of great significance in the occupational selection of persons for work in transport, aviation, and marine jobs and in the chemical, printing, textile, and other branches of industry. Daltonism is not subject to treatment.

REFERENCES

Averbakh, M. I. “Tsvetooshchushchenie i ego rasstroistva.” In Oftal’mologicheskie ocherki. Moscow, 1949.
Kravkov, S. V. Glaz i ego rabota, 4th ed. Moscow-Leningrad, 1950.
Rabkin, E. B. Polikhromalicheskie tablitsy dlia issledovaniia isvetooshchushcheniia, 8th ed. Moscow, 1965.

M. L. KRASNOV

daltonism


daltonism

 [dawl´ton-izm] red-green color blindness.

dal·ton·ism

(dawl'tŏn-izm), A color vision deficiency, especially deuteranomaly or deuteranopia. [J. Dalton]

daltonism

also

Daltonism

(dôl′tə-nĭz′əm)n. An inherited defect in perception of red and green; red-green colorblindness.
dal·to′ni·an (-tō′nē-ən), dal·ton′ic (-tŏn′ĭk) adj.

dal·ton·ism

(dawl'tŏn-izm) Red and green color blindness, transmitted as an X-linked trait. [John Dalton]

daltonism

Term used formerly to designate colour blindness, usually deutan, so named because John Dalton (1766-1844) was the first to describe his own anomaly. See defective colour vision.

Daltonism


Related to Daltonism: color blindness, John Dalton, Color blindness test
  • noun

Synonyms for Daltonism

noun dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red

Synonyms

  • deuteranopia
  • green-blindness

Related Words

  • red-green color blindness
  • red-green colour blindness
  • red-green dichromacy
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