[Homonymous visual field defect in established migraine with aura].

A 48-year-old patient was referred by his general practitioner for opthalmological work-up to clarify sudden onset of a persistent temporal visual field defect of the left eye and a dull headache. Diagnostic testing revealed a cerebrovascular insult with open foramen ovale and migraine with aura. The foramen was successfully closed and resulted in disappearance of the migraine attacks.