Patients referred to our tertiary center for a diagnostic workup of white matter hypersignals
Absence of oculomotor disorders on conventional clinical examination
Age \> 18 years
The controls can be recruited from the accompanying persons of the patients selected for the study, from the staff of the CHU of Nice or from the entourage of the investigating team;
Absence of known oculomotor disorders by the control
Age \> 18 years
You may not be if
Presence of a neurological, ophthalmological or general pathology that may interfere with the performance of digital video oculography
