HOURGLASS-SHAPED VISUAL-FIELDS AS A SIGN OF BILATERAL LATERAL GENICULATE MYELINOLYSIS

PURPOSE/METHODS: Bilateral visual field defects resembling an hourglas s could be produced by bilateral lateral geniculate lesions. We recent ly encountered such deficits in a 37-year-old woman after an episode o f central pontine myelinolysis. RESULTS/CONCLUSIONS: Automated static perimetry demonstrated the congruous visual field defects to involve b oth halves of the visual field. They were confirmed with kinetic perim etry, and they remained stable for four years. Magnetic resonance imag ing demonstrated enhancing lesions characteristic of myelinolysis in e ach lateral geniculate.