Inclusion Criteria:  The patient has been correctly informed. The patient must have given their informed and signed consent. The patient must be insured or beneficiary of a health insurance plan. The patient is at least (≥)18 years old.  The patient has experienced a CIS, has currently a RRMS or progressive MS with:  Less than 10 years of disease duration; With or without DMD; EDSS score 0 - 7.0.  Exclusion Criteria:  The patient is in an exclusion period determined by a previous study. The patient is under judicial protection. The patient refuses to sign the consent. It is impossible to correctly inform the patient (Inability to understand the study, language problem). The patient is pregnant or breast-feeding. Patient has a bilateral optic neuritis or other significant ophthalmological antecedent. Patient with MRI contra-indications. patient has a contraindication to gadolinium injection The patient has bilateral optic neuritis or other significant ophthalmological antecedent Patient is having a relapse or has had a relapse in the last 3 months The patient has a severe psychiatric illness The patient has severe chronic alcoholism