Bilateral Lupus Optic Neuropathy: Vascular or Demyelinative

A 39 year old woman began to have right eye pain on eye movement on 13 October 1979. Five days later she developed blurring of vision in her inferior visual field. This was discovered accidentally in the afternoon when she covered her left eye. There was no left eye complaint but the right eye became worse by evening that day and she was seen in consultation. She was a pack a day smoker and had a borderline elevated blood sugar a year earlier. History of 'viral' infection for weeks before.