Treatment with methylprednisolone (1000 mg intravenously once a day) or the bioequivalent dose of oral prednisone (1250 mg once a day; [1]) for 3 days followed by prednisone (1 mg / kg orally once a day) for 11 days may speed recovery, but ultimate vision results are no different from those with observation alone for multiple sclerosis or idiopathic optic neuritis.