title: Alteration of the light thresholds in scotopic and photopic vision in retinitis pigmentosa.
abstract: In a patient with retinitis pigmentosa, global and local adaptation were performed. The light thresholds were measured and the spatial summation coefficients evaluated in scotopic and photopic vision. The results are compared with those obtained in normal individuals.
mesh_terms: D000064:Acclimatization; D000293:Adolescent; D003624:Darkness; D006801:Humans; D008027:Light; D008297:Male; D010775:Photic Stimulation; D012016:Reference Values; D012174:Retinitis Pigmentosa / Q000503:physiopathology*; D012684:Sensory Thresholds; D013997:Time Factors; D014785:Vision, Ocular