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Noun1.dichromacy - a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision)
color blindness, color vision deficiency, colour blindness, colour vision deficiency - genetic inability to distinguish differences in hue
yellow-blue color blindness, yellow-blue dichromacy - confusion of yellow and blue
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References in periodicals archive ?
CIE-L*a*b* also allows the use of Euclidean distances between points to represent relative perceptual differences, and proves particularly relevant when discussing dichromacy.
For example, jumping spiders in the genus Habronattus have evolved a retinal filter in the AM eyes that increases their spectral sensitivities from UV-green dichromacy to UV-green-red trichromacy (Zurek et al., 2015).
Otherwise, the software tool named Coblis produced different colour transformations for both dichromacy types, but they were always inaccurate because of the systematic errors found both in [h.sub.uv] (for example, about 140[degrees] instead of 183[degrees] for pseudoachromatic green and protanopia) and [L.sub.R] (for example, [L.sub.R] was over one for the pseudoachromatic reds both for protanopia and deuteranopia, although predicted [L.sub.R] values for protanopia and pseudoachromatic reds were under one).