title: Horner's syndrome. Criteria for oculosympathetic denervation.
abstract: The darkness reflex of the pupil was examined by taking photographs under standard bright lighting conditions, and after 5 and 10 s of uninterrupted darkness. The study involved 40 control subjects and 12 patients with a presumed Horner's syndrome. No control subject showed a dilatation lag (compared with the other eye) of 0.5 mm or more in the first 5 s of darkness. This criterion allows exclusion of a fortuitous combination of "physiological anisocoria" and "physiological ptosis".
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003623:Dark Adaptation; D006732:Horner Syndrome / Q000175:diagnosis*; D006801:Humans; D007498:Iris / Q000294:innervation; D008875:Middle Aged; D009431:Neural Conduction; D011680:Pupil / Q000502:physiology*; D012025:Reflex, Pupillary; D013564:Sympathetic Nervous System / Q000503:physiopathology*