Canadian Medical Guide > Chemicals and Drugs > Growth Substances, Pigments, and Vitamins > Pigments > Retinal Pigments Terms and Definitions

Retinal Pigments

Medical Definition:	Chemicals functioning in the visual cycle in retinal rod cells. Through excitation by visible light, a series of complex molecular changes occur that serve to trigger in the optical nerve endings an impulse transmitted to the brain, resulting in the perception of vision.
Guide Notes:	not for deposition of pigments in the retina (= RETINITIS PIGMENTOSA)

Retinal Pigments Categories.

Opsin - A visual pigment protein found in the retinal rods. It combines with retinaldehyde to form RHODOPSIN.

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