The patient presented acutely with painless loss of vision in the left eye. Visual acuity was 20/20 OD, 1/200 OS, and there was a dense left relative afferent pupillary defect. The fundus shows retinal whitening (edema of the nerve fiber layer) in the macular region (arrow), with a "cherry-red" spot in the fovea, the classic appearance of a central retinal artery occlusion.
