Usher syndrome linked to more vision loss than asymptomatic retinitis pigmentosa

Usher syndrome type 2 caused greater visual field loss than asymptomatic retinitis pigmentosa, according to data presented at the Association for Research in Vision and Ophthalmology annual meeting.
“Patients who had Usher syndrome had worse visual field sensitivity or ability to see off to the side than those who had retinitis pigmentosa without any hearing loss. This measurement that we made — a quantitative measurement of side vision using a particular algorithm — was a very sensitive and reliable way of measuring visual field in patients with retinal degenerations,”

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