Which of these anticonvulsants causes contraction of visual field?
Levetiracetam
Phenytoin
Vigabatrin
Ethosuximide
Ans: C. VigabatrinVigabatrin:Causes irreversible diffuse atrophy of the retinal nerve fiber layer.Most effect on the outer area (as opposed to the macular, or central area) of the retina, leading to the contraction of the visual field.Retinal toxicity attributed to taurine depletion.