Eye Movement Desensitization and Reprocessing (EMDR) therapy is an extensively researched, effective psychotherapy method proven to help people recover from trauma and PTSD symptoms (National Institute of Health). 

Although EMDR does not focus directly on altering the emotions, thoughts and responses resulting from traumatic experiences, it does focus on memory. Specifically it is intended to change the way that the trauma memory is stored in the brain, thus reducing and eliminating the problematic symptoms.