Unilateral transient vision loss associated with an opacified Onodi cell

Abstract

Unilateral transient vision loss associated with an opacified Onodi cell An Onodi cell, also known as a sphenoethmoidal air cell, is a posterior ethmoidal air cell that has pneumatized laterally and rarely superiorly to the sphenoid sinus and is in close approximation to the optic nerve. 1 When drainage of the cell is obstructed, visual disturbances can occur by physical compression, inflammation, or a combination of the 2. Nonetheless, optic neuropathy secondary to an isolated