Complete color blindness results in a perception of the world only in black and white and is a result of
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, a result of genetic factors.
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, also known as achromatopsia, is caused by the absence or abnormal functioning of cones in the retina. Cones are responsible for color vision, and when they are missing or not functioning properly, a person can only perceive shades of gray.

Complete Color Blindness Results in a Perception of the World