Tags: Disease.
Usher syndrome is a relatively rare genetic disorder caused by a mutation in any one of 10 genes resulting in a combination of hearing loss and visual impairment and is a leading cause of deafblindness. Usher syndrome is incurable at present.Other names for Usher syndrome include Hallgren syndrome Usher-Hallgren syndrome retinitis pigmentosa-dysacusis syndrome and dystrophia retinae dysacusis syndrome.