What is a Retina?

The layer that lines the interior of the eye. The retina itself consists of two layers. The inner layer, next to the cavity of the eyeball, contains the light-sensitive cells, the rods and cones, and also nerve fibers. This layer receives light directed on to its surface by the lens. The outer layer of the retina, next to the choroid (membrane), contains pigmented cells that prevent the passage of light.