What is Usher Syndrome type 3?
With Usher syndrome type 3, at birth there is no hearing or visual impairment. Hearing loss and vision loss due to RP develop in adolescence or early adulthood and both are progressive. Researchers believe that the hearing loss in Usher syndrome is due to a problem with the sensory (nerve) cells in the cochlea, a structure within the inner ear that is necessary for transmission of sound to the brain.
• Usher Syndrome Type 3: A rare inherited disorder where children are born with normal hearing and vision which progressively deteriorates at a variable rate. Usher Syndrome Type 3 is listed as a “rare disease” by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Usher Syndrome Type 3, or a subtype of Usher Syndrome Type 3, affects less than 200,000 people in the US population.
