protann.adj.

Brit.

/ˈprəʊtən/, U.S.

/ˈproʊdən/,

/ˈproʊtn/

Origin: Formed within English, by clipping or shortening. Etymons: protanopia n.; protanomaly n.

Etymology: Partly shortened < protanopia n., and partly shortened < protanomaly n.

Ophthalmology.

A. n.

Protanopia or protanomaly (now rare); a person affected by either of these conditions.

ΘΚΠ

the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [noun] > colour blindness > person

idiopt1833

Daltonian1841

dichromatic1842

colour-blind1855

colour-defective1878

Daltonist1879

dichromat1893

monochromat1893

deuteranope1902

protanope1908

deuteranomal1915

protanomal1915

tritanope1915

protan1944

deutan1948

achromatopsic1986

1944 D. Farnsworth in Inter-Society Color Council News Let. lvi. 8 There are 3 or more types of Anomaly (chromatic imbalance). 1. n. Protan; adj. Protanous: reduction of red–bluegreen discrimination relative to interesting axis.

1954 Amer. Jrnl. Psychol. 67 186 Walls accepts this outcome as proof that the red receptors, overnumerous in the normal fovea, are replaced in the protan by blue ones.

1984 M. J. Taussig Processes in Pathol. & Microbiol. (ed. 2) vii. 840 (caption) Deutan, protan: forms of colour blindness.

2003 Human Factors 45 502/2 With highly visible signals, protans may be able to use intensity cues to distinguish between colors.

B. adj. (attributive).

Of, relating to, or affected by protanopia or protanomaly; protanopic or protanomalous.

ΘΚΠ

the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [adjective] > colour blind

dichromic1836

dichromatic1842

colour-blind1847

green-blind1868

red-blind1873

blue-blind1877

red–green1878

achromatopsic1883

dyschromatoptic1886

colour-weak1893

violet-blind1894

monochromatic1897

protanopic1898

protanomalous1911

tritanopic1915

deuteranomalous1932

tritanomalous1943

colour-defective1958

protan1961

1961 Vision Res. 1 213 Subjects of congenital protan or deutan defects together with retinitis pigmentosa are very liable to develop total colour blindness.

1974 Nature 23 Aug. 653/1 There are at least two gene loci involved in each of four X-linked diseases: colour blindness (protan and deutan), haemophilia.., muscular dystrophy.., and retinal degeneration.

1998 E. N. Sokolov in Human Cognitive Abilities in Theory & Pract. iii. 49 Protan color vision is characterized by a reduction of red-green axis contribution due to substitution of red pigment by a green one.

This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	protan
释义	protann.adj. Brit. /ˈprəʊtən/, U.S. /ˈproʊdən/, /ˈproʊtn/ Origin: Formed within English, by clipping or shortening. Etymons: protanopia n.; protanomaly n. Etymology: Partly shortened < protanopia n., and partly shortened < protanomaly n. Ophthalmology. A. n. Protanopia or protanomaly (now rare); a person affected by either of these conditions. ΘΚΠ the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [noun] > colour blindness > person idiopt1833 Daltonian1841 dichromatic1842 colour-blind1855 colour-defective1878 Daltonist1879 dichromat1893 monochromat1893 deuteranope1902 protanope1908 deuteranomal1915 protanomal1915 tritanope1915 protan1944 deutan1948 achromatopsic1986 1944 D. Farnsworth in Inter-Society Color Council News Let. lvi. 8 There are 3 or more types of Anomaly (chromatic imbalance). 1. n. Protan; adj. Protanous: reduction of red–bluegreen discrimination relative to interesting axis. 1954 Amer. Jrnl. Psychol. 67 186 Walls accepts this outcome as proof that the red receptors, overnumerous in the normal fovea, are replaced in the protan by blue ones. 1984 M. J. Taussig Processes in Pathol. & Microbiol. (ed. 2) vii. 840 (caption) Deutan, protan: forms of colour blindness. 2003 Human Factors 45 502/2 With highly visible signals, protans may be able to use intensity cues to distinguish between colors. B. adj. (attributive). Of, relating to, or affected by protanopia or protanomaly; protanopic or protanomalous. ΘΚΠ the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [adjective] > colour blind dichromic1836 dichromatic1842 colour-blind1847 green-blind1868 red-blind1873 blue-blind1877 red–green1878 achromatopsic1883 dyschromatoptic1886 colour-weak1893 violet-blind1894 monochromatic1897 protanopic1898 protanomalous1911 tritanopic1915 deuteranomalous1932 tritanomalous1943 colour-defective1958 protan1961 1961 Vision Res. 1 213 Subjects of congenital protan or deutan defects together with retinitis pigmentosa are very liable to develop total colour blindness. 1974 Nature 23 Aug. 653/1 There are at least two gene loci involved in each of four X-linked diseases: colour blindness (protan and deutan), haemophilia.., muscular dystrophy.., and retinal degeneration. 1998 E. N. Sokolov in Human Cognitive Abilities in Theory & Pract. iii. 49 Protan color vision is characterized by a reduction of red-green axis contribution due to substitution of red pigment by a green one. This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022). < n.adj.1944
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