Evaluation of the Prevalence of Oculomotor Disorders in Patients With Radiologically Isolated Syndrome

Inclusion Criteria: * The patient must have given his informed consent and signed the consent form. * The patient must be affiliated or beneficiary of a health insurance plan. * The patient is at least 18 years old (≥) and under 50 years old (≤). * Patients with radiologically isolated syndrome according to the criteria of Okuda et al. (2009) * Diagnosis of a radiologically isolated syndrome confirmed by the national expert center of Nice for less than 3 years. Exclusion Criteria: * The subject participates in another study. * The subject is in an exclusion period determined by a previous study. * The subject is under guardianship, curatorship or safeguard of justice. * The patient is pregnant or breastfeeding * The subject refuses to sign the consent. * It is not possible to give the subject informed information. * Patient presenting a pathological neurological examination. * Patient with visual acuity less than 5/10 or with ocular instability