![]() ![]() There are six different genes that cause Usher type 1, three that cause Usher type 2, and two that cause Usher type 3. There are at least eleven different genetic types of Usher syndrome, as determined by the genes that are involved. There are three clinical types: type 1, type 2 and type 3, which are distinguished by the severity and age when the signs and symptoms appear. Thus, people with Usher syndrome suffer from severe balance issues due to vestibular dysfunction. It’s estimated that upward of 10 percent of individuals with congenital bilateral, sensorineural hearing loss have Usher syndrome.īalance: Balance is achieved and maintained through input from your eyes, the vestibular organs in the inner ear and the sensory systems of the body, such as the skin, muscles and joints. ![]() Hearing: Children with Usher syndrome are born with or develop hearing loss. RP causes the light-sensing cells in the retina to gradually deteriorate, initially resulting in night blindness, followed by a narrowing of the visual field, commonly known as tunnel vision. Vision: Vision loss in Usher syndrome is caused by a progressive vision disorder known as retinitis pigmentosa (RP). Dystrophia retinae pigmentosa-dysostosis syndrome.Retinitis pigmentosa-dysacusis syndrome.Usher Syndrome Community What is Usher Syndrome?įrom Wikipedia and Usher Syndrome Coalition USHER SYNDROME IS THE MOST COMMON GENETIC CAUSE OF COMBINED DEAFNESS AND BLINDNESS. ![]()
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