Timothy's Vision Is a Focus of Interest for Many Ophthalmologists

Multiple Choice

Timothy's vision is a focus of interest for many ophthalmologists.He is able to see well when there is low illumination but not so well when there is a lot of light,for instance,if he is outdoors during the day.He is also unable to detect most colors during the day.Which poorly-functioning structure of the eye is most likely causing Timothy's unusual vision?

A) rods
B) cones
C) optic nerve
D) sclera