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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


a defect of the eyesight in which the retina does not respond to red. — protanope, n. — protanopic, adj.
See also: Color, Eyes
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.protanopia - dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
De acordo com o tipo de cone afetado ou ausente, existem tres tipos de discromopsia: (1) na protanopia, os individuos tem menor sensibilidade aos comprimentos de onda longos, que causam a sensacao de vermelho; (2) na deuteranopia, a sensibilidade e menor aos comprimentos de ondas medianas, responsaveis pelo verde; e (3) na tritanopia, a deficiencia nao permite a identificacao das cores relacionadas a comprimentos de ondas mais curtos (azul) (Fraser & Banks, 2007).
Protanopia is colour blindness resulting in insensitivity to which colour light?
eye defect, (2) myopic eye is corrected using., (3) long sightedness is also called., (4) in hypermetropia anteroposterior diameter of the eyeball., (5) the condition in which two eyes have unequal refractive error is called., (6) cylindrical lens used to correct which type of refractive error., (7) in protanopia which color cannot be appreciated., (8) out of the following which test is not used for color blindness, (9) central scotoma occurs in which condition of color blindness, and (10) condition of dichromatism in which there is defect in the receptor of third primary color is called.
Regardless of the type of colour blindness that a patient presents with (protanopia, deuteranopia, tritanopia), it is important to remember that no tinted contact lens will restore colour vision to levels that are perceived by the normal population.
Incidence of Protanopia and Deuteranopia, Defects of Colour Vision in Quetta, Pakistan.
Among people with visual impairments, 40% had hyperopia and 30% had macular degeneration and 20% had color vision deficiencies, of which protanopia and deuteranopia each were 50% (Figures 10, 11, and 12).
(1997, 3[degrees] and 183[degrees] for pseudoachromatic red and green in protanopia; 349[degrees] and 169[degrees] for pseudoachromatic red and green in deuteranopia).
Protanopia and deuteranopia result when long wavelength (L) photopigments (red) and middle wavelength (M) photopigments (green) are missing, respectively.
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.
About 21 of subjects had deficient red green pattern, 13 had protanopia, 4 had deuteran defect and 8 had total colour blindness.
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.