[Visual acuity and full-field electroretinography in patients with Usher's syndrome].

Purpose: Usher's syndrome (US) is a group of genetically distinct autosomal conditions, characterized by sensorineural hearing loss accompanied by a retinal dystrophy indistinguishable from retinitis pigmentosa (RP). The purpose of this study was to analyze full-field electroretinography (ERG) and visual acuity (VA) among patients with type I and II Usher's syndrome.

Methods: Electroretinography responses and visual acuity were studied in 22 patients (mean age at test = 26.