1 School of Doctoral Studies and Research (C.V.-C.), Universidad Europea de Madrid, Madrid, Spain; School of Biomedical and Health Sciences (C.Á.-P.), Universidad Europea de Madrid, Madrid, Spain; Centro Boston de Optometría (F.H.S.C.), Madrid, Spain; and Neurology Unit (F.J.P.-M.), Hospital 12 de Octubre Research Institute (i+12), Madrid, Spain.