We studied ocular movements in 130 patients with spinocerebellar degenerations. Patients had blurred vision (33.3%), diplopia (40.2%), oscillopsia (18.6%), ocular flutter (22.3%), rebound nystagmus (25.4%), square-wave jerks, (29.2%), macro square-wave jerks (6.2%), and macro saccadic oscillations (10.8%). Electro-oculographic abnormalities included reduction of saccadic velocity, dysmetria, and saccadic smooth pursuit. All the abnormal movements were improved by the injection of thyrotropin-releasing hormone.