Cone cells are a type of cell in the retina, the layer at the back
of the eye that responds to light. Cone cells detect color.
There are three types of cones: red, green, and blue. People with
color vision problems may have different amounts of each cone type, or they may
be completely missing one, two, or three of the cone types.
Kathleen Romito, MD - Family Medicine & Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology
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