A sonographic sign of papilledema.

A 26-year-old woman presented to the emergency department with a 2-week history of severe migratory headaches, visual disturbance, and intermittent nausea. She had no significant medical history and was not taking any medications regularly. Her vital signs were normal, but her visual acuity was impaired bilaterally and her visual fields were grossly normal to confrontation. A computed tomography (CT) scan of the head was unremarkable. Bedside focused ocular ultrasound (FOUS) revealed protrusion of the optic papilla into the posterior chamber (Figure 1). Retinal photography also revealed papilledema (Figure 2). The patient began acetazolamide therapy and was urgently referred to a neurosurgical unit for the management of idiopathic intracranial hypertension.