1 Department of Ophthalmology, Amiens University Hospital, Amiens, France.
2 Department of Ophthalmology, Amiens University Hospital, Amiens, France; Laboratory of Lille Neurosiences &Cognition, INSERM U1172, Lille, France.
3 Department of Biostatistic, Amiens University Hospital, Amiens, France.
4 Department of Neurology, Amiens University Hospital, 80054 Amiens, France; Laboratory of and Neurosciences Functional Pathology, (UR 4559), Picardie Jules Verne University, Picardie, France. Electronic address: godefroy.olivier@chu-amiens.fr.