Protanopes have:
A) M and S cones, but no L cones
B) M and L cones, but no S cones
C) L and S cones, but no M cones
D) all three cone systems, but one system is abnormal

Question

Quizplus · Accepted Answer

Protanopia is a type of dichromatic color vision deficiency in which the L cones are absent or not functioning properly. This means that protanopes have functioning M and S cones, but no functioning L cones, making it difficult to distinguish between red and green colors.

Protanopes Have