Unilateral fixed dilated pupil in a well child.

摘要

A19-month-old boy attended the paediatric assessment unit with asymmetrical pupils. This had first been noticed 8 h previously. The boy had asthma for which he was prescribed both salbutamol and ipratropium bromide inhalers, which were given via a spacer and facemask. That morning, inhaler administration had been difficult, as his mother's attempts to deliver the drugs had been resisted. On examination, the child was found to be well with a unilateral left dilated pupil, which did not react to light (fig 1). There were no other eye signs, and systemic examination was unremarkable. The pupil did not constrict when pilocarpine drops of either 0.1% or 1% concentration were applied to the eye, indicating a pharmacological cause for the mydriasis. By the next morning, the symptom had completely resolved.