Retinitis Pigmentosa

Retinitis pigmentosa (RP) comprises a large group of inherited vision disorders that cause progressive degeneration of the retina (the so-called inherited retinal diseases, or IRDs), the light sensitive membrane that coats the inside of the eyes. Peripheral (or side) vision gradually decreases and eventually is lost in most patients. Central vision is usually preserved until late in these conditions. Some forms of RP can be associated with deafness, obesity, kidney disease and various other general health problems, including central nervous system and metabolic disorders and occasionally chromosomal abnormalities.

Reference: Rare Diseases (NORD)