title: A new cause for difficulty in seeing at night.
abstract: A syndrome is described in which patients complain of inability to see at night, although their rod and cone thresholds are normal. In such persons the rods, when dark-adapted, elevate cone flicker thresholds by 2 log units or more, and this condition is the basis of their complaint. Patients are often thought to be hysterics or to have congenital stationary night blindness.
mesh_terms: D000328:Adult; D003623:Dark Adaptation; D004056:Differential Threshold; D005260:Female; D005425:Flicker Fusion; D006801:Humans; D009755:Night Blindness / Q000209:etiology* / Q000503:physiopathology; D010786:Photoreceptor Cells / Q000503:physiopathology; D014785:Vision, Ocular