Pronounced physiological pupillary hippus

Background: The term "hippus" describes pupillary oscillations of variable amplitude and frequency and may be physiological or part of a pathological entity, Thus, pupillary hippus is often the target: of extensive clinical i nvestigation. Case report: A 9-year-old boy was seen in our emergency room in March 1998. Examination showed distinct pupillary oscillations in the absence of any o ther pathological findings. We presented the patient to a pediatric neurolo gist. Apart from a history of enuresis and of motor ties in the neck region , the present neurological examination was normal. Conclusions: Even a pronounced hippus may be physiological and does not nec essarily require extensive diagnostic investigations.