People who are totally color blind
A)can distinguish all color shades except for red and green.
B)see only shades of black and white.
C)have the most common form of color vision problem.
D)lack rods or have rods that do not function properly.

Question

Quizplus · Accepted Answer

People who are totally color blind, a condition known as achromatopsia, perceive the world in shades of black, white, and gray because they lack functioning cones, which are the photoreceptor cells responsible for color vision.

People Who Are Totally Color Blind