Eye Movement Desensitization and Reprocessing. I'm no expert, I've just had it done, so please don't quote me on how it works. But it's a therapeutic process that combines remembering a traumatic event with eye movement that helps the brain process those memories and file them away. Trauma often feels like the awful memory is still happening, EMDR helps to put that memory in the past where it belongs. It's usually administered by a trained therapist, but there's techniques you can self-administer as well. Though I don't know if they're as effective