Complete color blindness results in a perception of the world only in black and white and is caused by
A) cones that are missing or function abnormally.
B) rods that fail to function under higher levels of illumination.
C) excessive pigmentation of the cornea.
D) a lens that has lost its elasticity and can no longer focus the image appropriately on the retina.

Question

Quizplus · Accepted Answer

Complete color blindness or achromatopsia is caused by the absence or dysfunction of cones, which are responsible for color vision. The condition results in seeing the world only in black, white, and gray.

Complete Color Blindness Results in a Perception of the World