What is Retinitis Pigmentosa?
Retinitis pigmentosa comprises a group of inherited disorders, such as Leber’s, in which the rods and cones that make up the photoreceptor cells in the retina are dysfunctional, due to genetic mutations.
Retinitis pigmentosa primarily affects the side (peripheral) vision due to deterioration of the rod photoreceptors, but in later life it can affect the cones, rarely resulting in total blindness, but possibly leading to the state of “legal blindness” by age 40. Most people retain central vision with restricted side vision into their 50s. This is referred to as tunnel vision.