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Usher's and Hallgren's Syndromes

1974; Cambridge University Press; Volume: 23; Issue: S1 Linguagem: Inglês

10.1017/s1120962300023623

2059-6316

S. Merin, F.A. Abraham, E. Auerbach,

Retinal Development and Disorders

A study has been made of 35 patients belonging to 20 families, all diagnosed as Usher's syndrome (retinitis pigmentosa and deafness). The results indicate that there are four clinical types, which have been called Types I to IV. Genetically, they represent at least two, and possibly three or four, separate entities.