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A form of anomalous trichromatism due to a defect of the green-sensitive retinal cones.
[G. deuteros, second, + anōmalia, anomaly]
deuteranomaly/deu·ter·anom·a·ly/ (doo″ter-ah-nom´ah-le) a type of anomalous trichromatic vision in which the second, green-sensitive cones have decreased sensitivity; the most common color vision deficiency.deuteranom´alous
a type of anomalous trichromatic vision in which the green-sensitive cones have decreased sensitivity. It is an X-linked trait, affecting about 5% of white males and 0.25% of females in the United States, and is the most common color vision deficiency.
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.