protanopia

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protanopia

 [pro″tah-no´pe-ah]
imperfect perception of red, with confusion of reds and greens; called also red blindness. adj., adj protanop´ic.

pro·ta·no·pi·a

(prō'tă-nō'pē-ă),
A form of dichromatism characterized by absence of the red-sensitive pigment in cones, decreased luminosity for long wavelengths of light, and confusion in recognition of red and green.
[G. prōtos, first, + a- priv. + ōps (ōp-) eye]

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

(prō′tə-nō′pē-ə)
n.
A form of colorblindness characterized by defective perception of red and confusion of red with green or bluish green.

pro′ta·nop′ic (-nŏp′ĭk) adj.

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

Ophthalmology Red-green color blindness due to a lack of long wavelength–LW, 560 nm photopigment

pro·ta·no·pi·a

, protanopsia (prō'tă-nō'pē-ă, -nopsē-ă)
Ocular disorder that is a form of dichromatism characterized by absence of the red-sensitive pigment in cones, decreased luminosity for long wavelengths of light, and confusion in recognition of red and green.
[G. prōtos, first, + a- priv. + ōps (ōp-) eye]

protanopia

Partial colour blindness with defective perception of red.

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.

pro·ta·no·pi·a

, protanopsia (prō'tă-nō'pē-ă, -nopsē-ă)
Ocular disorder that is form of dichromatism.
[G. prōtos, first, + a- priv. + ōps (ōp-) eye]