EMDR became a codified therapy strategy in the nineties, but the concept of using units to generate alternating bilateral stimulations is historic. Early practitioners of mediation inspired men and women participating in mediation to hold bells in equally palms and ring them alternatingly in the course of selected meditative practices. https://hasster.com/blogs/46309/EyeScan-Lightbar-A-Hands-Free-Support-Tool-for-EMDR