Eye movement desensitization and reprocessing (EMDR) is a form of psychotherapy in which the person being treated is asked to recall distressing images; the therapist then directs the person in one type of bilateral sensory input, such as side-to-side eye movements or hand tapping.[1] It is included in several guidelines for the treatment of post-traumatic stress disorder (PTSD).[2][3][4]

It was developed by Francine Shapiro in the 1990s, and has been controversial, with critics citing ongoing concerns over the quality of evidence,[5][6] contradictory findings,[7] significant rates of researcher bias,[6] and dropout rates in studies.[6]