loss of central vision in one or both eyes as a result of malfunctioning cone cells in the retina.
Two types: "wet " (disciform) and "dry" (atrophic). Also known as age-related macular degeneration (ARMD or AMD), and previously known as senile macular degeneration.
For more information, See
What Is Macular Degeneration? and
Eye Diseases on the MD Support web site.