Usher, Charles Howard (1865 - 1942)
It is the association of retinitis pigmentosa and congenital deafness.
Type I = profound neurosensory deafness and absent vestibular function
Type II = less profound deafness, intact vestibular function and visual symptoms tend to occur later
Cambridge University and St. Thomas's Hospital, London (medical qualification in 1891)Postgraudate:
House surgeon to Edward NettleshipPublication:
Usher CH (1914) On the inheritance of retinitis pigmentosa, with notes of cases. R Lond Ophthalmol Hosp Rep 19:130