Eye Movement Desensitization Reprocessing (EMDR)
EMDR was developed by Francine Shapiro Ph.D in 1987. EMDR is a treatment for Post-Traumatic Stress Disorder (PTSD) as well as other mental health conditions. The treatment brings together your traumatic or stressful memories and positive thoughts and beliefs to help reduce the distress stemming from your traumatic/stressful event.
What to expect
Compared to many forms of psychotherapy which may involve anywhere from twenty hour-long weekly sessions to one or two years (or even longer, depending on the severity of symptoms and multiple other factors), EMDR is very cost-effective due to its very short-term nature. Many EMDR clients experience substantial relief after very few sessions.
In a typical EMDR session, the clinician will have you focus your thoughts on a stressful or traumatic event in your life, including any physical sensations (e.g. increased heart rate or knots in the stomach) and negative emotions that accompany it. While you're reflecting on this event, the therapist will be using bilateral stimulations such as a light bar, musical tones, or hand tappers.
More info here: https://www.emdria.org/page/emdr_therapy