title: Retinitis pigmentosa: a psychophysical test of explanations for early foveal sensitivity loss.
abstract: A psychophysical procedure, the probe-flash paradigm, was used to test explanations of early foveal sensitivity loss in retinitis pigmentosa. The findings suggest that this loss may be due to a decreased responsiveness of retinal elements and not to a decrease in quantum catching ability of functioning photoreceptors.
mesh_terms: D000328:Adult; D002648:Child; D003623:Dark Adaptation; D004596:Electroretinography; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D008297:Male; D008875:Middle Aged; D010786:Photoreceptor Cells / Q000503:physiopathology*; D012174:Retinitis Pigmentosa / Q000503:physiopathology*; D014792:Visual Acuity