title: Hippus of the pupil: periods of slow oscillations of unknown origin.
mesh_terms: D000065:Accommodation, Ocular; D000886:Anthropometry; D004106:Dilatation; D004553:Electric Conductivity; D006339:Heart Rate; D006801:Humans; D010507:Periodicity; D010775:Photic Stimulation; D011680:Pupil / Q000502:physiology*; D012018:Reflex; D012025:Reflex, Pupillary; D012063:Relaxation; D012119:Respiration; D012879:Skin Physiological Phenomena