EMDR (eye movement desensitization and reprocessing) is a structured and evidence-based psychotherapy that helps people reduce and process distress associated with challenging life experiences and traumatic memories. During EMDR, a therapist will guide a client through recalling distressing memories while using bilateral stimulation, such as tapping or guided eye movements to support adaptive processing and reduce the emotional impact of those memories. 
https://www.youtube.com/watch?v=C5Yl6cy7m4Y
​https://www.youtube.com/watch?v=Pkfln-ZtWeY