What Is EMDR? A Plain-Language Guide
If you've been looking into therapy for trauma, you've probably come across the acronym EMDR. The full name is Eye Movement Desensitization and Reprocessing and if that doesn't do much to clear things up, we’ll understand!
Descriptions of the therapy can sound downright strange at first. You think about a traumatic memory while moving your eyes back and forth? It's understandable to be skeptical. But behind the unusual name is a very thoroughly researched treatment for trauma. The World Health Organization recommends EMDR, alongside trauma-focused CBT, for the treatment of PTSD in both adults and children.
This article walks through what EMDR actually is, what happens in a session, and what it can and can't do so you can decide whether it's worth exploring.
Where EMDR Came From
EMDR was developed in the late 1980s by psychologist Francine Shapiro, who noticed that certain eye movements seemed to reduce the intensity of her own distressing thoughts. She developed that observation into a structured therapy and began exploring it’s uses with people who had experienced trauma.
The early reception was mixed and plenty of clinicians found the premise hard to take seriously. What changed over time was the research. Over the past three decades, EMDR has been studied in dozens of clinical trials, particularly for post-traumatic stress disorder (PTSD), where it has generally performed comparably to the best-established talk therapies. Today it's considered a fairly mainstream and evidence-based treatment rather than a fringe technique. That said, its mechanism of action is still debated and it has its detractors.
The Theory Behind It
To understand EMDR, it helps to think about what trauma does to memory. Most experiences, even unpleasant ones, get processed and filed away. You can recall them without reliving them.
When something overwhelming happens, that filing process can get disrupted. The theory is that these memories get stored in a raw and unprocessed form with the original images, sensations, and beliefs still attached. This explains why a reminder of a traumatic event can feel less like remembering and more like reliving it, and why beliefs formed in that moment ("I'm not safe" or “It was my fault") can persist for years even when you logically know better.
EMDR is built on the idea that the brain has a natural capacity to process and integrate these memories. It just needs the right conditions to do it. The therapy is designed to create those conditions, so that the memories can finally be filed away as something that happened in the past, rather than something that is still happening.
What Actually Happens in a Session?
EMDR follows a structured protocol, and the part most people have heard about (the eye movements) comes later than you might expect.
The first sessions look a lot like the start of any therapy. Your therapist takes a careful history, works with you to identify your concerns and which memories or experiences to target, and makes sure you have solid coping strategies in place before any reprocessing begins. This preparation phase is really important, and a good EMDR therapist won't rush it.
When reprocessing begins, your therapist will ask you to bring a specific memory to mind along with the image, the negative belief, and the body sensations that go with it while you follow a form of what's called bilateral stimulation. Classically that means tracking the therapist's fingers with your eyes as they move back and forth, but taps or alternating tones can also be used. You do this in short sets, and between sets your therapist checks in on what you're noticing. Whatever comes up (a new thought, an image, an emotion, nothing at all) you simply notice it and continue.
One thing many people find relieving: EMDR doesn't require you to describe the traumatic event in detail. You need to hold it in mind, but you don't need to narrate it. For people who find talking through their trauma unbearable, this can make treatment feel much more approachable.
Do the Eye Movements Really Matter?
Here's an honest answer: researchers are still debating this exact question.
The leading theory is that holding a memory in mind while performing a demanding task, like tracking eye movements, taxes your working memory. This seems to make the memory less vivid and less emotionally intense, and gives your brain room to reprocess it.
Other researchers argue that the eye movements are less important than the mental exposure to the memory itself.
What isn't debated is that research suggests that the therapy as a whole works. The uncertainty is about the mechanism and not the outcome. And this is true of more medical and psychological treatments than most people realize.
Who EMDR Can Help
The strongest evidence for the benefits of EMDR is in treating PTSD, whether from a single event like an accident or assault, or from prolonged experiences like chronic abuse or childhood adversity.
It's also commonly used for anxiety, phobias, grief, and distressing memories that don't meet the threshold of a formal PTSD diagnosis.
The research base outside of PTSD is more modest, so a thoughtful therapist will be upfront about where the evidence is strong and where it's still developing.
EMDR is not for everyone. It’s just one option and there are other evidence-based treatments for PTSD and other traumatic events that don’t involve bilateral stimulation. If you are skeptical of the approach or it just doesn’t feel quite right, then consider other treatments instead. Part of your therapist's job is to help you figure out whether it fits your situation, or if it’s something worth trying.
What to Expect From the Process
Reprocessing sessions can be tiring. It's common to feel drained afterward, and some people notice vivid dreams or new memories surfacing between sessions. That's generally a sign of progress and not that something has gone wrong. But it's something to be aware of, and something your therapist will help you to understand and work through.
How long treatment takes varies widely. A single-incident trauma might resolve in a handful of reprocessing sessions; while more complex or long-standing experiences take longer. What tends to change with successful EMDR isn't that you forget what happened. You'll still remember it, but the memory loses its charge. People often describe it as the difference between watching a film of the event and being inside it.
It's also worth knowing what EMDR is not. It isn't hypnosis. You're fully awake, aware, and in control the entire time, and you can stop at any point. It’s also isn't a one-session miracle cure either, despite what some corners of the internet might suggest.
If you're wondering whether EMDR might be a fit for you, consider reaching out. Our Registered Social Worker Laura Frias is offering EMDR treatment to her clients. She’d be happy to talk through your symptoms, answer your questions, and discuss whether EMDR might be right for you.
This article is part of The Therapy Guide, a collection of resources developed by the clinicians at Starling Psychological Services to support informed decisions about therapy. The information in The Therapy Guide is provided for general educational purposes and is not a substitute for individualized psychological advice or treatment. © 2026 Starling Psychological Services. All rights reserved. This content may not be reproduced without permission.