EMDR Light Bar: What It Is and How It’s Used

An EMDR light bar is a narrow device with a row of LED lights that illuminate in a moving left-right pattern. A client tracks the light with their eyes only, without turning their head, while a therapist controls its speed and direction. It’s the most common way visual bilateral stimulation is delivered during EMDR therapy.

Why was the light bar invented?

EMDR didn’t start with equipment. In the therapy’s early years, a therapist would hold up two fingers and move a hand side to side for the client to follow with their eyes only. Doing that for a full day of back-to-back sessions takes a toll on a shoulder, neck, and elbow. Per The Art and Science of EMDR, light bars were built to solve exactly that: a mechanical stand-in for the therapist’s hand that doesn’t get tired.

How does a light bar work in session?

The therapist sets the bar a comfortable distance away, then adjusts the light’s speed and travel width from a console or paired app, per EMDR Kit’s setup guide. The client’s job is simple: follow the light with just their eyes while holding a target memory in mind. Freeing the therapist’s hands this way means they can watch a client’s face and body instead of counting passes. The EMDR Institute lists this visual form of bilateral stimulation alongside audio tones and tactile taps (EMDR buzzers) as the three recognized dual attention stimuli used in EMDR.

Does eye tracking work better than tapping or tones?

Not clearly, and that honesty matters more than brand loyalty to any one device. One explanation, working memory theory, holds that following a moving light occupies the same limited mental capacity used to hold a memory vividly in mind. That competition for mental bandwidth is part of why the memory can feel less sharp and less charged afterward. A 2023 systematic review in EMDR Therapy Quarterly found solid lab support for that mechanism, but noted that in real clinical trials, eye movements haven’t clearly outperformed other dual-attention tasks like tapping.

Can you use a light bar for self-guided practice?

Light bars are built and sold for therapists to run during a session, not for casual home use, so you’re unlikely to need or find one for practicing on your own. If you want the same visual-tracking idea outside a therapy office, that’s the self-guided EMDR route: tools built for that recreate a moving visual target in software instead of hardware. EmEase, a self-guided EMDR app, offers exactly that: an on-screen moving target you can adjust for speed and pattern at app.emease.com, built for everyday stress and looping thoughts rather than a stand-in for therapist-led work.