protanopia
   Also known as protan colour deficiency and protan colour blindness. The term protanopia comes from the Greek words protos (first), an (not), and opsis (seeing). It translates roughly as 'not being able to see the first of the primary colours (i.e. red)'. It is used to denote a type of * colour vision deficiency characterized by a loss of red sensitivity. Due to this loss of red sensitivity, there is no perceptible difference between the colours red, orange, yellow, green, and brown, and between various shades of purple. In addition, the brightness of these colours is reduced in comparison to the brightness experienced by individuals with normal trichromasy. The term protanopia was coined in or shortly before 1837 by German physicist August L.F.W. Seebeck (1805-1849) to denote a type of colour vision deficiency in which the colour system is reduced to blue and yellow, with a shortening of the spectrum length at the red end. When the long-wavelength cones (L-cones) are missing, the term red-dichromacy protanopia is used. When these cones are present, but functioning defectively, the term *protanomaly applies. Protanopia is inherited as a sex-linked Mendelian recessive characteristic. The term is used in opposition to the terms *deuteranopia and * tritanopia.
   References
   McIntyre, D. (2002). Colour blindness. Causes and effects. Chester: Dalton Publishing.
   Seebeck, A. (1837). Ueber den bei manchen Personen vorkommenden Mangel an Farbensinn. Annalen der Physik und Chemie, 42, 177-233.

Dictionary of Hallucinations. . 2010.

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  • Protanopia — Saltar a navegación, búsqueda Disfunción visual relacionada con la percepción del color. La Protanopia es la carencia de sensibilidad al color rojo. Se denomina también dicromacia roja. Consiste en la ausencia de actividad funcional de los… …   Wikipedia Español

  • protanopía — protanopia protanopia f. oftalm. Aneritropsia. Medical Dictionary. 2011. protanopía Forma de ceguera …   Diccionario médico

  • protanopia — protanopia. См. протанопия. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • protanopia — [prō΄tə nō′pē ə] n. [ModL: see PROTO , AN 1, & OPIA] a defect of color vision characterized by the inability to see red …   English World dictionary

  • Protanopia — Disfunción visual relacionada con la percepción del color. La Protanopia es la carencia de sensibilidad al color rojo. Se denomina también dicromacia roja. Consiste en la ausencia de actividad funcional de los protoconos, que son sensibles a la… …   Enciclopedia Universal

  • protanopía — Eng. Protanopia Ver protanopsia …   Diccionario de oftalmología

  • protanopia — protanopic /proht n op ik/, adj. /proht n oh pee euh/, n. Ophthalm. a defect of vision in which the retina fails to respond to red or green. [1900 05; < NL; see PROT , AN 1, OPIA] * * * …   Universalium

  • protanopia — noun A form of color blindness. Involves a defect in distinguishing between red and green …   Wiktionary

  • protanopia — A form of dichromatism characterized by absence of the red sensitive pigment in cones, decreased luminosity for long wavelengths of light, and confusion in recognition of red and green. [G. protos, first, + a priv. + ops (op ) eye] * * *… …   Medical dictionary

  • protanopia — pro·ta·no·pì·a s.f. TS med. forma di daltonismo spec. nei confronti del colore rosso {{line}} {{/line}} DATA: 1958. ETIMO: der. di proto e opia con an …   Dizionario italiano

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