Dizziness After Concussion: Could It Be Your Eyes?

Dizziness after a concussion is usually blamed on the inner ear alone. Often the visual system is involved too — and treating only the balance system leaves half the problem untouched.

Dizziness is one of the most common and most stubborn symptoms after a concussion. It's also one of the most frequently mistreated, because balance depends on three systems working together — the inner ear, the joints and muscles, and vision — and most dizziness workups focus almost entirely on the first one.

Vision contributes more to balance than people realize. The brain constantly cross-references what the eyes see against what the inner ear reports about head movement. When those two signals agree, the result is stable balance and clear vision even while moving. When a concussion disrupts the visual system's side of that equation, the brain gets conflicting information — and the result often feels exactly like inner ear dizziness, even when the ear itself is fine.

How vision and balance are connected

The vestibulo-ocular reflex is the mechanism responsible for keeping your vision stable while your head moves — it's what lets you read a street sign while walking or keep someone's face in focus while shaking your head. It relies on precise, fast coordination between the inner ear's motion sensors and the muscles that control eye movement. Under normal conditions, this reflex operates in milliseconds, correcting eye position faster than you could ever do it consciously, which is exactly why it's so disruptive when the timing or accuracy of that correction goes wrong.

A healthy vestibulo-ocular reflex is also part of why most people can walk down a hallway, glance at their phone, and look back up without any sense of the world lurching. Take that reflex out of sync, even slightly, and ordinary movement starts to feel effortful and unstable in a way that's hard to describe to someone who hasn't experienced it.

A concussion can disrupt this reflex directly, causing the eyes to lag or overshoot during head movement. It can also disrupt the broader visual coordination system — convergence, focusing, and tracking — in ways that create a persistent mismatch between what the eyes report and what the rest of the balance system expects. Either way, the result is the same: a sense of the world tilting, spinning, or feeling unstable, particularly during movement or in visually busy environments.

Why visually triggered dizziness has a specific pattern

Dizziness with a visual component tends to show up in recognizable situations: scrolling on a phone or computer screen, walking through a grocery store or shopping mall with patterned shelves and fluorescent lighting, riding as a passenger in a car and watching the scenery move past, being in a crowd where many things are moving at once, or reading for more than a few minutes at a time.

This is a meaningfully different pattern from dizziness triggered purely by head position changes, like rolling over in bed or looking up quickly, which points more toward the inner ear. Many people after a concussion have some combination of both, which is exactly why an evaluation needs to look at each system rather than assuming one explains everything.

Keeping a simple log for a week or two — noting what you were doing right before the dizziness started, and roughly how long it lasted — can make this pattern much easier to spot and describe accurately at an appointment than trying to recall it after the fact.

What standard testing misses

Vestibular physiotherapy, which addresses the inner ear side of balance, has good evidence behind it and is often the first treatment offered after a concussion. But if the visual system's contribution to the dizziness isn't also assessed, treatment addresses only part of the problem. A patient can complete a full course of vestibular therapy and still feel dizzy in stores, on screens, or while reading, because the visual coordination deficit driving those specific triggers was never identified or treated.

A neuro-visual evaluation tests exactly the functions a vestibular assessment doesn't: how well the eyes converge and hold focus, how accurately they track a moving target, and how effectively the vestibulo-ocular reflex is functioning during head movement. This distinguishes a visually driven component of dizziness from a purely vestibular one, and often finds both operating at once.

How it's treated

When the assessment identifies a visual contribution to dizziness, treatment usually combines vision therapy techniques with vestibular rehabilitation exercises rather than relying on one or the other alone. This might include exercises that specifically retrain the vestibulo-ocular reflex, along with broader work on convergence, focusing, and visual processing.

This combined approach reflects a broader pattern in concussion research: symptoms rarely arise from a single system in isolation, and treatment tends to work better when it addresses the systems actually involved rather than the one that's easiest to test. Programs that integrate vestibular and visual rehabilitation are increasingly the standard recommendation for post-concussion dizziness that hasn't resolved with vestibular treatment alone.

Vision therapy or vestibular therapy — how to tell which you need

Most people don't need to figure this out on their own, but a few clues can help frame the conversation with a provider. If dizziness happens mainly with specific head positions or movements — rolling over in bed, looking up at a shelf, turning quickly — the inner ear is more likely the primary driver. If it happens mainly with visual tasks — screens, reading, busy stores, riding as a passenger and watching the scenery — the visual system is more likely involved.

In practice, a large share of post-concussion patients have some degree of both, and a proper workup tests for each rather than assuming one explains the whole picture. This is also why dizziness that doesn't fully resolve with vestibular physiotherapy alone is a reasonable prompt to ask specifically about a visual evaluation, rather than concluding that the dizziness is simply going to be a long-term fact of life.

When to ask about vision

If dizziness has persisted despite vestibular therapy, or if it's specifically triggered by screens, reading, stores, or busy visual environments rather than head movement alone, it's worth asking whether a visual evaluation has been part of the workup. Many patients go through months of balance-focused treatment before anyone checks how well their eyes are converging and tracking.

At Toronto Vision Therapy & Optometry in North York, our neuro-visual evaluations assess the vestibulo-ocular reflex and the broader visual coordination system together, so dizziness gets addressed from every angle actually contributing to it.

Frequently asked questions

How can an eye problem cause dizziness?

The visual, vestibular, and proprioceptive systems constantly cross-check each other to maintain balance. When a concussion disrupts eye teaming or tracking, that mismatch between what the eyes report and what the inner ear reports can register as dizziness or imbalance.

Should I see a vestibular therapist or an optometrist first?

Either is a reasonable starting point, and many patients need both. A neuro-visual evaluation and vestibular physiotherapy assess related but distinct systems, and coordinating the two is common in concussion care.

Is dizziness in crowded or visually busy places a red flag?

It's a common and recognizable pattern in visually driven post-concussion dizziness, and worth mentioning specifically during a neuro-visual evaluation rather than filing it under general disorientation.

Related reading

Visual Midline Shift Syndrome: Causes, Diagnosis, and Treatment

Double Vision After Concussion: What You Should Know

Can Vision Therapy Help After a Concussion?

Book a neuro-visual evaluation at tvto.ca/booking or call us at 416-498-3438.