Retinitis pigmentosa (RP) is a genetic disorder of rod cells which enables us to see in dark. It arises usually in chilhood but can be seen in aduldhood as well. The prognosis changes according to each person, each patient has a different level of visual loss. The biggest complaint of patienst is not being able to see in the dark and and dim light and the hard visual adaptation between light and dark.
As rod cells get affected and degenerated the patient begin to have disturbances in his/her vision in dim light. A narrow visual field is left undegenerated at late stages of the disease.
The incidence of RP is 1/4000, more in men. RP can be seen along with a genetic disorder, the commonest being USHER syndrome. Deafness occur in USHER syndrome as well.
Visual field tests, FFA, ERG, OCT tests are performed for diagnosis. There are no treatment, only the side findings can be treated.
Filtered eyeglasses and telescopes are prescribed, vitamin A usage is recommended. Ranibizumab (Lucentis) and bevacizumab (Avastin) injections can be considered in some patients.
Prosperous stem cell and retinal chip studies are made for RP.