Moroso A, et al. - Using neuropsychological and ocular motor (OM) testing, the authors examined the early cognitive profile in clinically isolated syndrome (CIS) with and without cerebellar dysfunction with OM testing compared to healthy subjects (HS). In order to evaluate cognitive and cerebellar dysfunctions in CIS, eye tracking was a sensitive tool. Cerebellar impairment was correlated with working memory, executive functions, and information processing speed (IPS) slowness among CIS patients.