Retinitis pigmentosa is a group of inherited retinal diseases that gradually damage the photoreceptor cells, leading to progressive vision loss. While there is no cure, understanding the condition and current research offers patients meaningful agency.
How RP Develops
The rod photoreceptors, responsible for low-light and peripheral vision, are typically affected first. Night vision suffers early, often in adolescence or young adulthood. Peripheral vision narrows over years, sometimes leaving only central tunnel vision.
Genetic Basis
RP can follow autosomal dominant, autosomal recessive, or X-linked inheritance patterns. More than 70 genes have been linked to various forms. Genetic testing helps clarify the specific subtype, which can guide prognosis and research participation.
Early Signs
Difficulty seeing in dim light or at night is often the earliest sign. Tripping over objects in peripheral vision, slow adaptation when entering dark rooms, and gradually reduced side vision often follow.
Diagnostic Tools
Electroretinography measures retinal electrical responses and can detect changes early. Optical coherence tomography images retinal layers in fine detail, and visual field testing maps the extent of peripheral vision.
Current Treatment Options
Voretigene neparvovec is a gene therapy approved for patients with RPE65 mutations and has restored functional vision in some cases. Vitamin A supplementation may slow progression in certain subtypes, though this should be physician-supervised.
Living Well With RP
Low vision rehabilitation, orientation and mobility training, and assistive technology dramatically extend independence. Connecting with patient organizations provides community and current information on clinical trials. For comprehensive RP information, the American Academy of Ophthalmology offers reliable resources.