A field expander for patients with retinitis pigmentosa: a clinical study.
An inexpensive, commercially available optical device was tested on 10 patients with retinitis pigmentosa to determine its value as a field expander for scanning and as an aid to mobility. Visual acuity and visual fields were measured with and without the expander, and the patients' subjective responses were monitored by a questionnaire that was administered at regular intervals during a 2- to 4-week period between test sessions. Six of the 10 subjects considered the device helpful in at least 1 important visual task and planned to continue using it.
D000328:Adult; D003258:Consumer Behavior; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007909:Lenses; D008297:Male; D008875:Middle Aged; D012174:Retinitis Pigmentosa / Q000534:rehabilitation*; D014794:Visual Fields