Fig. 2.

Visual field test results at each episode. a, At the first episode of right optic neuritis (acute optic neuritis, OD), there were global visual field defects in the right eye and a superotemporal visual field defect in the left eye. b, Five months after the right optic neuritis, there were recoveries of visual field defects in both eyes. c, Seven months after the right optic neuritis, the patient developed acute painless visual loss in the right eye (LHON, OD). Central scotoma developed in the right eye. d, 18 months after the right optic neuritis, visual loss developed in the left eye (LHON, OS). There were global field defects in the right eye and central scotoma in the left eye