Eye Movement Desensitization and Reprocessing (EMDR) therapy is an interactive psychotherapy technique used to relieve psychological stress. During EMDR therapy sessions, you relive traumatic or triggering experiences in brief doses while the therapist directs your eye movements. EMDR is thought to be effective because recalling distressing events is often less emotionally upsetting when your attention is diverted. This allows you to be exposed to the memories or thoughts without having a strong psychological response. Over time, this technique is believed to lessen the impact that the memories or thoughts have on you.