Usher's syndrome. Ophthalmic and neuro-otologic findings suggesting genetic heterogeneity.

Abstract

The conditions of 70 patients with Usher's syndrome were studied by ophthalmic and neuro-otologic examinations. Two distinct clinical and presumed genetic types were discernible on the basis of differences in hearing impairment, vestibular sensitivity, and, to a lesser extent, deterioration in retinal photoreceptor function. Distinguishing these two types… (More)

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