Joe is unable to see blues and yellows but can distinguish between reds and greens. He has
A)only cones in his retina and no rods.
B)an extremely rare form of color weakness.
C)visual agnosia.
D)only rods in his retina and no cones.

Question

Quizplus · Accepted Answer

Joe's inability to see blues and yellows but can distinguish between reds and greens indicates a rare form of color vision deficiency, not the complete absence of cones or the presence of only rods, nor does it suggest visual agnosia, which is a different type of visual processing disorder.

Joe Is Unable to See Blues and Yellows but Can