Frequently asked questions
Everything therapists ask before their first online BLS session.
- What is bilateral stimulation?
- Bilateral stimulation (BLS) is the rhythmic left–right sensory input used during EMDR therapy — visual, auditory or tactile — to support processing of distressing memories.
- What is EMDR?
- EMDR (Eye Movement Desensitization and Reprocessing) is an evidence-based eight-phase psychotherapy for trauma, developed by Francine Shapiro and recommended for PTSD by the WHO, APA and NICE.
- Can EMDR be done online?
- Yes. Online EMDR uses the same eight-phase protocol; only BLS delivery is adapted for video. Published outcomes are broadly comparable to in-person work when protocol fidelity is maintained.
- Do my clients need to install anything?
- No. Clients open a link in any modern browser — desktop, tablet or phone. No app, no account, no download.
- Does BilateralSync work with Zoom, Teams and Doxy.me?
- Yes. BilateralSync runs in a browser tab alongside any video platform: Zoom, Microsoft Teams, Doxy.me, Google Meet, SimplePractice and others.
- How low is the latency?
- Sub-100 ms between therapist controls and the client display. Changes to speed, pattern or audio are visible/audible essentially instantly.
- Can I use both visual and auditory BLS at the same time?
- Yes. Visual and stereo-panned auditory BLS run in perfect sync.
- What patterns are available?
- Horizontal, infinity (figure-eight), circular and pendulum. Speed, size and audio pan depth are independently adjustable.
- Is BilateralSync GDPR-ready?
- Yes. No client PII is collected, sessions use unguessable codes, analytics is cookieless and anonymous. A DPA is available for clinics on request.
- Is there a free plan?
- Yes — start unlimited free sessions with core BLS controls. Paid plans add saved presets, longer session history and priority support.
Still stuck? Contact us or read the knowledge hub.