Usher syndrome, type I, French variety (medical condition)

A rare inherited disorder characterized by sensorineural deafness at birth or soon after and progressive vision loss which starts during the first decade of life and blindness usually occurs between 20-35 years of age. Symptoms are generally more severe than in type 2 with deafness occurring at birth or during first year and vision loss starting during childhood. See also Usher Syndrome Type 1