The initials EMDR stand for eye movement desensitization and reprocessing, that is to say desensitization and reprocessing by eye movements. It uses sensory stimulation (right-left) which is practiced by eye movements - the patient follows the therapist's fingers which pass from right to left in front of his eyes -, but also by auditory stimuli - the patient wears a helmet which makes him hear alternately a sound to the right, then to the left. This therapy is mainly used for post traumatic stress.