Visual Outcomes Following Optic Nerve Sheath Fenestration

Idiopathic intracranial hypertension (or pseudotumor cerebri) is a condition of increased intracranial pressure in the absence of vascular lesion or intracranial mass1. Symptoms of IIH include headache, pulsatile tinnitus, transient visual obscurations, and diplopia. Untreated IIH can present with the long-term sequela of visual loss2. In approximately 10% of patients with untreated IIH, visual loss will progress to the point of meeting the legal criteria for blindness3. The objective of this study was to determine the safety of optic nerve sheath fenestration (ONSF) for the treatment of patients with intracranial hypertension in the immediate 6 month post-operative period and its efficacy in reducing optic disk edema.