Macular degeneration (also known as age-related macular degeneration) occurs when cells in the macula - the central area of the retina - degenerate. The retina is a light sensitive layer that lines the interior of the eye. It is composed of light sensitive cells known as rods and cones. See Anatomy of the Eye for further information.
This is a companion discussion topic for the original article at https://patient.info/eye-care/visual-problems/age-related-macular-degeneration