Cysticercosis of the optic nerve has been reported only twice in the litera
ture. A case of optic nerve cysticercosis in a 50-year-old woman with atypi
cal optic neuritis is reported. Computerized tomography showed a thickened
left optic nerve with a ring-enhancing lesion containing an eccentric nodul
e. An enzyme-linked immunosorbent assay test for cysticercosis further esta
blished the diagnosis. The patient was treated with oral prednisolone and a
lbendazole, with no improvement in vision.