Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
a type of anomalous trichromatic vision in which the second, green-sensitive, cones have decreased sensitivity. It is an X-linked trait, affecting about 5 per cent of white males in the U.S.A. and 0.25 per cent of females, and is the most common color vision deficiency.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
A form of anomalous trichromatism due to a defect of the green-sensitive retinal cones.
[G. deuteros, second, + anōmalia, anomaly]
Farlex Partner Medical Dictionary © Farlex 2012
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
A type of anomalous trichromatism in which an abnormally high proportion of green is needed when mixing red and green light to match a given yellow. This is the most common type of colour vision deficiency, occurring in about 4.6% of males and 0.35% of the female population. Syn. deuteranomalous trichromatism; deuteranomalous vision; green-weakness. See anomaloscope; defective colour vision.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann