red color blindness
Protanopia is a severe type of color vision deficiency caused by the complete absence of red retinal photoreceptors. Protans have difficulties distinguishing between blue and green colors and also between red and green colors. It is a form of dichromatism in which the subject can only perceive light wavelengths from 400 to 650 nm, instead of the usual 700 nm. Pure reds cannot be seen, instead appearing black; purple colors cannot be distinguished from blues; more orange-tinted reds may appear as very dim yellows, and all orange-yellow-green shades of too long a wavelength to stimulate the blue receptors appear as a similar yellow hue. It is hereditary, sex-linked, and present in 1% of males.
MONDO:0001703
color vision disorder
is_a
MONDO:0005328
eye disorder
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MONDO:0100545
hereditary neurological disease
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CBP
related
colorblindness, partial, protan series
related
colorblindness, protan
exact
partial achromatopsia, protan type
exact
protan defect
exact
protanopia
exact
red color blindness
exact