Segmental retinal periarteritis with branch arterial occlusion.

An 18-year-old woman complained of acute visual field loss in the right eye due to branch arterial occlusion. Similar disease occurred in the left eye two years later. Extensive laboratory examination revealed no factor of etiologic significance, and no sign of uveitis was observed. The retinal arterioles around the optic disc were segmentally inflamed angiographically, which led to their obstruction. Corticosteroid therapy (betamethazone, 3.0 mg/day) improved the arteriolitis within two weeks.