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The cerebellum is responsible for sculpting and refining ocular movements to ensure their precision and accuracy (to bring images to the fovea and keep them stable there), thereby guaranteeing the best possible visual acuity and clarity despite changes in body or head positions or movement of the object of interest. Cerebellar lesions do not abolish eye movements but cause them to become coarse, slow, imprecise, and unreliable, leading to degradation in the quality of vision.

Disclosures: Dr SC Beh has no relevant disclosures. TC Frohman is a consultant and speaker for Biogen Idec and Novartis. Dr EM Frohman has received speaker fees from Biogen Idec, Teva Neuroscience, and Acorda Pharmaceuticals, and consulting fees from Biogen Idec, Teva Neurosciences, Abbott, Acorda Therapeutics, and Novartis. a Department of Neurology, University of Texas Southwestern Medical Center, 5323 Harry Hines …