In children, most cases of optic neuritis are immune-related. Less frequently, it may also be due to
demyelinating disorders. Other secondary causes such as infection of adjacent structures or infiltration are
even rarer. The occurrence of optic neuritis in children on chemotherapy also has not being extensively
reported. We report a case of bilateral optic neuritis in a young girl with subacute visual loss after receiving
systemic chemotherapy for embryonal ovarian carcinoma.