The retina is a thin nerve membrane that detects light entering the
eye. Nerve cells in the retina send signals of what the eye sees along the
optic nerve to the brain.
The retina lines the back two-thirds of the eye and is made up of
two layers: the sensory retina and the retinal pigment epithelium (RPE).
The macula, near the center of the retina at the back of the
eyeball, provides the sharp, detailed, central vision a person uses for
focusing on what is directly in the line of sight. The rest of the retina
provides side (peripheral) vision, which lets a person see shapes but not fine