Structural Comparison of the Optic Nerve Head Based on Visual Prognosis after Acute Primary Angle Closure

To compare optic nerve head (ONH) and peripapillary structural OCT parameters between eyes with and without visual field (VF) defects one year after an episode of acute primary angle closure (APAC) in a cohort treated uniformly treated with early clear-lens extraction. Forty-seven eyes of 47 patients with a history of APAC episode who underwent early clear-lens extraction at Chonnam National University Hospital were retrospectively reviewed. Spectral-domain optical coherence tomography (SD-OCT) performed one year after the episode was used to assess Bruch's membrane opening-minimum rim width (BMO-MRW), retinal nerve fiber layer (RNFL) thickness, lamina cribrosa (LC) thickness and depth, and parapapillary atrophy (PPA) subdivided into PPA+BM and PPA-BM. Patients were classified according to the presence or absence of VF defects. At one year, 23 eyes (48.9%) had variable degrees of visual field (VF) defects. Compared with eyes with normal VF, the VF-defect group showed significantly thinner global BMO-MRW (p