ETT® works by incorporating precisely applied light and color during interpersonal processing. Practitioners observe that this process can support shifts in how emotional memories affect clients and help restore emotional balance. In addition to addressing individual emotional distress, ETT® also supports couples in building emotional safety, trust, and acceptance of one another.

The visual stimulation used in ETT® combines four procedures with interpersonal processes:

• Multidimensional Eye Movement (MDEM) uses individualized visual targets during interpersonal processing, with the aim of engaging the neural mechanisms underlying emotional or physical distress.
• Spectral Resonance Technique (SRT) uses a specialized chart of deeply saturated colors during interpersonal processing to support emotional regulation and engagement. It is designed to bring non-conscious emotional material into awareness so it can be worked with directly. Some clients report significant and lasting shifts in longstanding emotional distress over a course of sessions.
• Peripheral Eye Stimulation (PES) uses specialized goggles that direct carefully calibrated beams of light within the peripheral visual field during interpersonal processing. It is particularly well-suited for clients with light sensitivity or those who become easily overwhelmed by emotional distress. Some clients with migraine headaches have reported relief following PES sessions, though individual responses vary.
• The Light Emitting Device emits selected wavelengths of light during expressive processing. ETT®'s theoretical framework proposes that different wavelengths may engage different neural states, allowing the therapist to work with specific presentations of distress while the client engages in therapeutic dialogue.