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anomalous trichromatism anomalous trichromatic vision.
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 defect in color perception in which there appears to be an abnormality or deficiency in one of the three primary pigments of the retinal cones. See: protanomaly, deuteranomaly, tritanomaly.
Farlex Partner Medical Dictionary © Farlex 2012
A form of defective colour vision in which three primary colours are required for colour matching, but the proportion of each primary is not the same as those required by a normal trichromat. There are three types of anomalous trichromatism; deuteranomaly, protanomaly and tritanomaly. Syn. anomalous trichromacy; anomalous trichromatic vision. See primary colours; defective colour vision.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann