Rod monochromats lack functional cones, leaving only rods to detect light. As a result, they cannot distinguish colors and have poor visual acuity, but their rod cells are highly sensitive to light, allowing them to see well in low light conditions. Their dark adaptation curves lack the characteristic rod-cone break since they have no functional cones.

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Rod Monochromats

Question 31

Multiple Choice

Rod monochromats

A) have very good visual acuity.
B) see much better in daylight conditions than at night.
C) produce dark adaptation curves without the characteristic rod-cone break.

Correct Answer: