Retinitis pigmentosa is an eye disease in which there is damage to the
Causes, incidence, and risk factors
Retinitis pigmentosa can run in families. The disorder can be caused by a number of genetic defects.
The cells controlling night vision (rods) are most likely to be affected. However, in some cases, retinal cone cells are damaged the most. The main sign of the disease is the presence of dark deposits in the retina.
The main risk factor is a family history of retinitis pigmentosa. It is an uncommon condition affecting about 1 in 4,000 people in the United States.