colour blindness
   The term colour blindness was introduced in or shortly before 1844 by the Scottish physicist and homo universalis David Brewster (1781-1868) as an alternative for the expression * Daltonism. Brewster's proposal for this new name was inspired by his observation that there are actually more colour defects than those described by John Dalton (1706-1844) in his 1794 article on the subject. The term colour blindness refers to the inability or diminished ability to distinguish between two or more colours. Although this group of visual deficiencies is traditionally referred to as colour blindness, true colour blindness (i.e. * achromatopsia) is extremely rare. What is generally meant by the term colour blindness is a * colour vision deficiency. As a consequence, the term colour vision deficiency is the preferred term to denote any of these conditions.
   References
   Brewster, D. (1826). On the invisibility of certain colours to certain eyes. Edinburgh Journal of Science, 4, 85-87.
   McIntyre, D. (2002). Colour blindness. Causes and effects. Chester: Dalton Publishing.

Dictionary of Hallucinations. . 2010.

Look at other dictionaries:

  • colour blindness — colour blind ► ADJECTIVE ▪ unable to distinguish certain colours. DERIVATIVES colour blindness noun …   English terms dictionary

  • colour-blindness — noun [uncountable] Thesaurus: ability to see and problems with seeinghyponym race relations and racismhyponym eye and parts of the eyemeronym Main entry: colour blind …   Useful english dictionary

  • colour blindness — Inability to distinguish one or more colours. The human retina contains three types of cone cells that absorb light in different parts of the spectrum. Absence of these types causes colour blindness to red, green, and blue. Colour blindness is a… …   Universalium

  • colour blindness — noun genetic inability to distinguish differences in hue • Syn: ↑color blindness, ↑color vision deficiency, ↑colour vision deficiency • Derivationally related forms: ↑colour blind (for: ↑color blindness), ↑ …   Useful english dictionary

  • colour blindness — any of various conditions in which certain colours are confused with one another. True lack of colour appreciation is extremely rare (see monochromat), but some defect of colour discrimination is present in about 8% of Caucasian males, and 0.4%… …   Medical dictionary

  • colour blindness — any of various conditions in which certain colours are confused with one another. True lack of colour appreciation is extremely rare (see monochromat), but some defect of colour discrimination is present in about 8% of Caucasian males, and 0.4%… …   The new mediacal dictionary

  • colour blindness — spalvinis aklumas statusas T sritis fizika atitikmenys: angl. color blindness; colour blindness; daltonism vok. Anerythropsie, f; Daltonismus, m; Farbenblindheit, f rus. дальтонизм, m; цветовая слепота, f pranc. achromatopsie, f; anérythropsie,… …   Fizikos terminų žodynas

  • colour blindness — /ˈkʌlə blaɪndnəs/ (say kuluh bluyndnuhs) noun defective colour perception, independent of the capacity for distinguishing light and shade, and form. Also, color blindness …   Australian English dictionary

  • colour-blindness — noun The state or quality of being colour blind …   Wiktionary

  • colour-blindness — See: colour blind …   English dictionary

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