| | Retinitis Pigmentosa (Site not responding. Last check: 2007-10-08) |
 | | Retinitis pigmentosa is actually the name given to a group of hereditary eye disorders, all of which involve the eye's retina, the light-sensitive nerve layer that lines the back of the eye, and all of which cause a gradual, yet progressive, loss or reduction in visual ability. |
 | | Retinitis pigmentosa is caused by a variety of different inherited retinal defects - all of which affect the ability of the retina to sense light. |
 | | Some persons with retinitis pigmentosa experience a slow, very progressive loss of vision, while others lose their visual ability much more quickly and severely. |
| medicalcenter.osu.edu /patientcare/healthinformation/diseasesandconditions/eyecare/disorders/retinitis (362 words) |