Stargardt Disease is the most common form of inherited juvenile macular degeneration. The disease not only causes the loss of central vision but also affects colour vision. With onset from about the age of 6, the effects vary from minor to complete loss of central vision. Also known as fundus flavimaculatus, is usually diagnosed in individuals under the age of 20 when decreased central vision is first noticed. The progression of visual loss is variable.
Source: Fighting Blindness