Optic nerve head abnormalities in primary open-angle glaucoma and their associations with axial length

PURPOSE: To determine the frequency of peripapillary retinoschisis (PRS), lamina cribrosa defect (LCD), peripapillary intrachoroidal cavitation (PICC), and prelaminar schisis (PLS) in primary open-angle glaucoma (POAG) eyes and investigate their association with axial length (AXL). STUDY DESIGN: Retrospective cross-sectional METHODS: Optical coherence tomography scans of 263 POAG eyes were reviewed for PRS, LCD, PICC, and PLS. The frequency of each optic nerve head (ONH) abnormality was compared between eyes with and without high myopia (HM), defined as AXL > 26 mm. Associations with AXL were assessed using univariable and multivariable logistic regression, adjusting for gender, age, intraocular pressure, visual field mean deviation, circumpapillary retinal nerve fiber layer thickness and Bruch's membrane opening (BMO) area. RESULTS: PRS, LCD, PICC, and PLS were observed in 11.8%, 31.6%, 18.3%, and 55.1% of all POAG eyes, respectively. 77.2% exhibited at least one abnormality, and 31.2% had multiple abnormalities. PRS, LCD, and PICC were more frequent in HM eyes (p = 0.001, 0.016 and