![]() The rods are also responsible for providing a peripheral (wider) field of vision. This leads to loss of low-light or night vision. With the progression of the disorder, the rods (cells which convert light waves to electrical impulses are affected first. The name of this condition is supposed to have partially originated from the tendency of the retinal epithelium to break down at the time of degeneration. Medical researchers have not yet conclusively proved the association of any other factor with this disease. Retinitis pigmentosa Risk FactorĪ family history of this disorder is the main risk factor for RP. Low retinal function at birth (Leber congenital amaurosis)Īround 70 varying types of genetic defects have been identified that lead to the development of different forms of RP.Degeneration of the choroid of the eye (Choroideremia).Progressive neurological degeneration (Bassen-Kornzweig).A few physical abnormalities (Bardet-Biedl).RP is supposed to be associated to other genetic disorders, which include: The presence of dark deposits in the retina is the primary symptom of this condition. In some cases, however, the retinal cone cells are found to be the most damaged. The condition typically affects the rods, or the cells that are responsible for controlling night vision. The disease has been found to run in families and is hence, supposed to arise due to a number of genetic defects. The exact causes of this condition have not been fully determined or understood. ![]() About 1 out of every 100 RP sufferers is assessed to be a carrier of associated genetic abnormalities that could be transmitted and could be manifested as RP in succeeding generations. This is a rare disease and affects only around one out of every 4,000 individuals in the United States. The ICD9 Code for this disease is 362.74. It refers to an eye disorder characterized by damage to the retina, the tissue layer situated at the posterior area of the inner eye that converts light images to nerve signals and transmits them to the brain. ![]()
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