What are the retina and vitreous?
The retina is an extension of the brain. It forms the interior lining of the eye and contains millions of light-sensitive nerve endings (rods and cones). The light rays that enter the eye though the cornea, then pass through the pupil, lens and vitreous ultimately focus on the retina which receives the light and transmits nerve impulses through the optic nerve to the brain, where a visual image is created.
