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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]
a defect of the eyesight in which the retina does not respond to red. — protanope, n. — protanopic, adj.See also: Color, Eyes