Comparison of optic nerve head topography findings in eyes with non-arteritic anterior ischemic optic neuropathy and eyes with glaucoma.

Background: To compare the peripapillary retinal nerve fiber layer (RNFL) thickness in eyes affected by non-arteritic ischemic optic neuropathy (NAION) or glaucoma as determined by optical coherence tomography (OCT).

Methods: This cross-sectional institutional study included 18 eyes with NAION (at least 6 months since the acute event) and 29 eyes with glaucoma, both having localized visual field (VF) defects confined to one hemifield. Twenty-nine normal subjects served as controls.