title: Use of light intensifiers in improving acuity in retinitis pigmentosa.
abstract: An English Electric Valve Co. P8073 light intensifier was set up with a viewing system to assess the performance of retinitis pigmentosa sufferers at low luminance levels. Six subjects had their acuity measured at different luminance levels using a light intensifier initially and subsequently using direct vision. All subjects showed an improvement in acuity using the intensifier compared with direct vision at levels of illumination ranging from 0.25 cd m-2 to 20 cd m-2.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D008875:Middle Aged; D010789:Phototherapy; D012174:Retinitis Pigmentosa / Q000503:physiopathology* / Q000628:therapy; D014792:Visual Acuity