title: Presumed bilateral branch retinal vein occlusions secondary to antiepileptic agents.
abstract: A 61-year-old man presented to the ophthalmology department having developed bilateral branch retinal vein occlusions. Baseline blood tests revealed no abnormality; however, subsequent investigations showed a raised plasma homocysteine (HC) level. The patient has been treated for refractory epilepsy for a number of years. Although antiepileptic medications have been shown to reduce folate levels and result in a raised HC level, this has not previously been shown to be to a level causing a retinal vascular event.
authors.affiliation: Leicester Royal Infirmary, Leicester, UK.
authors.forename: Rumana N
authors.initials: RN
authors.lastname: Hussain
authors.forename: Somnath
authors.initials: S
authors.lastname: Banerjee