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Analysis of a 38-year-old woman showed mild cupping in her optic disc (A) and optical coherence tomography showed reduced retinal nerve fiber layer (RNFL) thickness (B). Her visual field result was unreliable (C) but a Ganglion cell thickness map revealed a left homonymous vertical pattern of loss (D). OD = right eye; OS = left eye; GCL = ganglion cell layer; IPL = inner plexiform layer.
