EMDR is a therapeutic modality originally developed to help process trauma. In an EMDR session, a patient is prompted to undergo eye movements that mimic those of REM sleep. This is accomplished by watching a therapist's finger move back and forth across, or following a bar of light. The goal is repetitive sets of eye movements that help the brain reprocess memory, which can significantly reduce the intensity of remembered traumatic incidents. Associated memories can heal simultaneously, leaving patients significantly calmer, more stable, and more emotionally relaxed.