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Related to protanopia: Protanomaly, deuteranopia


A form of colorblindness characterized by defective perception of red and confusion of red with green or bluish green.

[prot(o)- + an- + -opia (from the blindness to red, which is considered the first of the primary colors).]

pro′ta·nop′ic (-nŏp′ĭk) adj.


(Pathology) a form of colour blindness characterized by a tendency to confuse reds and greens and by a loss of sensitivity to red light
[C20: New Latin, from proto- + an- + -opia]
protanopic adj


a defect of the eyesight in which the retina does not respond to red. — protanope, n. — protanopic, adj.
See also: Color, Eyes
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.protanopia - dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue
References in periodicals archive ?
Added Modes for Colour-blind Titan Pilots - three colour-blind options including protanopia, deuteranopia and tritanopia that affects IFF glows, crosshair colours and names above heads.
There are a few tests we can use but the most commonly used one is Ishihara colour plates, which easily detect protanopia (red/ green) colour deficiency.
Table 1 Prevalence of congenital colour deficiency types classified according to the number of colour matching variables needed to obtain all the spectral hues Type of colour deficiency Prevalence Class Denomination Men Women Protan Altered Protanopia Severe 1% 0.