Medical Definition of Retinal

Reviewed on 3/29/2021

Retinal: Pertaining to the retina, the extraordinary layer of neurons (nerve cells) that line the back of the eye, which can sense light and create impulses capable of voyaging through the optic nerve to the brain where the impulses are recognized as an image.

For a diagram showing the retina and other structures in the eye, see: Retina.

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