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?

Question

Quizplus · Accepted Answer

Cones are responsible for color vision and function best in bright light. Timothy's inability to see well in bright light and detect colors suggests a problem with his cones.

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