What do rods do in the eye?
Rods are light-sensitive receptors in the retina of vertebrates. They are sensitive to dim light. They contain a photo-sensitive pigment “rhodopsin” which when exposed to light absorbs it and the light energy released in this reaction causes a generator potential which if matches threshold stimulus travels through neurons as action potential into the optic nerve transmitting it to the brain.In the absence of light(darkeness) vitamin A and ATP converts it back into light sensitive pigment rhodopsin thus stopping the signals to brain via optic nerve.
