CW is a 25-year-old woman who presented with complaints of pain and reduced vision in her left eye for about a week. Examination found visual acuity of 20/20 OD and of 20/60-2 OS with a 3+ afferent pupil defect. The left eye was mildly proptotic. Fundus examination showed a normal right optic disc and moderate edema of the left disc with several focal hemorrhages. Some perivascular sheathing was noted peripherally.
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