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©2013 UpToDate ® Print Email Assessment of the optic disc in healthy and glaucomatous eyes The top row shows findings in normal eyes and the bottow row findings in glaucomatous eyes. C: Scanning laser polarimetry: retinal nerve fibre layer thickness is reduced inferotemporally and superonasally. D: Confocal scanning laser ophthalmoscopy: neuroretinal rim area is within normal limits (ticks) in healthy eye but reduced in inferior and superonasal regions (crosses) in glaucomatous eye. E: Standard automated perimetry: normal blind spot and superior scotomas (arrows) in glaucoma. Reprinted with permission from: Weinreb, RN, Khaw, PT. Primary open- angle glaucoma. Lancet 2004; 363:1711. Copyright © 2004 Elsevier.