A member asked:

What is the difference between deuteranopia vs protanopia?

A doctor has provided 1 answer
Dr. Ralph Morgan Lewis answered

Specializes in Family Medicine

Dimmed bright colors: Protanopes lack long-wavelength-sensitive cones & are unable to distinguish between colors in the green–yellow–red part of the spectrum. Also the brightness of red, orange, & yellow is much reduced. Deuteranopes lack medium-wavelength cones; they have the same hue discrimination problems as the protanope, but without the abnormal dimming. Both have red-green colorblindness.

Answered 2/9/2021

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