Assessment of Empathetic Process by Scanpath Study of an Artwork

Inclusion Criteria: * Male or Female. * 60 years old and above. * Sufficient written and oral expression in French. * Benefit from French or Monaco Social security. * Written informed consent signed by the patient. * For the control group: voluntary subjects, without cognitive impairment. * For the FTD / AD / PD groups: patients diagnosed with one of these diseases, and volunteers to participate in the study. Exclusion Criteria: * General anaesthesia within 3 months. * Ophthalmological problems preventing a video-oculography examination. * Oculomotor disorders such as "fixation disorders" or "ocular tracking disorders". * History of stroke. * Cognitive disorders of the type: visual agnosia, visuo-spatial disorder, visuo-perceptual disorder or aphasia.