protanopia /pro·ta·no·pia/ (pro″tah-no´pe-ah) dichromatic vision with perception of two hues only (blue and yellow) of the normal four primaries, lacking that for red and green and their derivatives.protanop´ic
protanopia
protanopia
pro·ta·no·pi·a (pr  t -n p -)n. A form of colorblindness characterized by defective perception of red and confusion of red with green or bluish green. |
protanopia
[-tənō′pē·ə]
a form of color blindness in which the person is unable to distinguish shades of red. Also called red blindness.
protanopia
Type of dichromatism in which only two hues are seen: below 493 nm all radiations appear bluish whereas above it they all appear yellowish. Around 493 nm is the neutral point. The luminosity function of protanopes is significantly decreased for red radiations (for which he or she is almost blind). The condition occurs in about 1.1% of the male population. Syn. red blindness. See dichromatism; pseudoisochromatic plates; neutral point.
protanopia
Ophthalmology Red-green color blindness due to a lack of long wavelength–LW, 560 nm photopigment
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