Vestibular assessment · Patient guide
Dynamic visual acuity testing, the objective test of vestibulo-ocular reflex function.
Dynamic visual acuity (DVA) testing measures visual acuity during passive or active head movement. Detects vestibular hypofunction — a key part of the vertigo workup and the video head impulse test (vHIT) battery.
Key facts at a glance
- 01
Definition
Measurement of visual acuity during passive or active head movement.
- 02
Detects vestibular hypofunction
Objectively demonstrates a weak vestibulo-ocular reflex (VOR).
- 03
Complements vHIT and caloric test
Part of the modern vestibular battery — each test answers a different question.
- 04
Vestibular rehab assessment
A baseline and outcome measure for vestibular rehabilitation therapy.
- 05
Bedside and computerised options
Simple bedside version plus a gold-standard computerised DVA in the vestibular lab.
- 06
Delivered by specialists
Performed by an audiologist or a vestibular physiotherapist.
How it’s done
Diagnosis steps — what happens, in order.
A quick, non-invasive test — around 5 minutes at the chair, embedded in a wider vestibular workup.
Phase 1 · Before
Consultation and baseline
Phase 2 · The test
~5 minutes at the chair
Phase 3 · After
Report and rehab plan
- 01
Before
ENT or vertigo consultation
A specialist history focused on dizziness, oscillopsia and balance triggers.
- 02
Before
Static visual acuity baseline
Standard acuity chart read with the head still — the reference for comparison.
- 03
The test
Head-shake or head-thrust manoeuvre
The clinician moves your head passively — or asks you to shake it — at a set frequency.
- 04
The test
Repeated acuity chart reading
You read the chart during head movement; letters missed are recorded.
- 05
The test
Score compared to static baseline
The drop in acuity (lines lost) quantifies VOR performance.
- 06
The test
Combined with vHIT if available
Video head impulse testing adds an objective eye-movement recording.
- 07
After
Written report and rehab plan
A clear report with the diagnosis, severity, and a personalised vestibular rehab plan.
What it shows
When DVA is the right test.
DVA answers one specific question — how well your VOR keeps the world steady when your head moves. These are the presentations where it matters most.
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Vestibular hypofunction (bilateral)
The classic indication — both vestibular systems underperforming.
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Unilateral vestibular loss
Asymmetric VOR after vestibular neuritis or labyrinthitis.
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Concussion-related vestibular dysfunction
Persistent dizziness and gaze instability after head injury.
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Age-related vestibular decline
Presbyvestibulopathy contributing to falls and unsteadiness.
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Ototoxic drug vestibular injury
Post-aminoglycoside or platinum-based chemotherapy vestibulopathy.
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Post-Ménière’s residual loss
Quantifies the vestibular deficit after burnt-out Ménière’s disease.
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Vestibular schwannoma-related deficit
Documents VOR loss on the affected side pre- or post-intervention.
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Red flag: rapidly progressive bilateral loss with oscillopsia
Investigate ototoxicity or autoimmune vestibulopathy urgently.
Next steps
What comes after an abnormal DVA.
The test is a means to a management plan — these are the routes clinicians typically choose.
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Vestibular rehabilitation therapy
Gaze-stabilisation and adaptation exercises — the mainstay of recovery.
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Balance retraining
Progressive somatosensory and visual-substitution work to reduce fall risk.
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Address ototoxic drug exposure
Review current medication with the prescribing team; stop or substitute where possible.
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MRI IAM for asymmetric loss
Rule out vestibular schwannoma or other retrocochlear pathology.
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ENT / neuro-otology referral
Specialist opinion when the picture is complex or progressive.
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Anti-migraine therapy
For vestibular migraine — lifestyle, triggers and prophylactic medication.
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Fall-prevention programme
Home assessment, strength and balance classes, and vision optimisation.
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Structured follow-up
Repeat DVA to measure the response to rehabilitation over time.
Red flags
When DVA findings need urgent escalation.
A weak VOR is often benign and responds to rehab — but some patterns need immediate specialist input.
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Bilateral vestibulopathy
Both sides affected — high fall risk and marked oscillopsia.
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Ototoxic drug injury
Aminoglycosides and platinum-based chemo can silently damage the vestibular system.
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Oscillopsia
The world appears to bounce with each step — a hallmark of severe VOR loss.
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Vestibular schwannoma
Asymmetric findings warrant an MRI of the internal auditory meatus.
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Concussion-related persistent deficit
Vestibular symptoms persisting beyond expected recovery need dedicated rehab.
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Superior canal dehiscence
Sound- or pressure-induced vertigo with characteristic examination findings.
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Progressive Ménière’s disease
Fluctuating hearing and vertigo evolving into fixed vestibular loss.
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Post-labyrinthitis persistent oscillopsia
Incomplete central compensation months after the acute episode.
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Autoimmune inner-ear disease
Rapidly progressive bilateral loss — needs urgent immunology and ENT input.
Frequently asked
Everything we get asked about DVA testing.
Quick answers on what the test is, how it compares to vHIT, and what an abnormal result means.
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What is dynamic visual acuity testing?
Dynamic visual acuity (DVA) testing measures how well you can see during head movement. It is an objective test of the vestibulo-ocular reflex — the mechanism that keeps your gaze stable on the world when your head moves.
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How is DVA different from the vHIT?
The video head impulse test (vHIT) records eye movements with high-speed cameras during small, unpredictable head thrusts. DVA measures the functional consequence — how many letters you lose from a standard acuity chart when your head is moving. The two are complementary.
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Does the test hurt?
No. DVA is entirely non-invasive. The clinician either moves your head gently or asks you to shake it while you read letters — there are no needles, no radiation, and no medication.
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Who performs the test?
A specialist audiologist or a vestibular physiotherapist, usually as part of a wider vestibular workup.
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What does an abnormal result mean?
A significant drop in acuity during head movement indicates vestibular hypofunction — one or both vestibular systems are underperforming. The pattern tells your clinician whether the problem is unilateral, bilateral, or central.
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Can DVA be used to track vestibular rehabilitation?
Yes. DVA is a validated outcome measure — repeat testing shows objective improvement as gaze-stabilisation exercises take effect.
Sources
Guidance and reference standards.
- British Society of Audiology. Recommended procedures for vestibular assessment.
- Bárány Society. International classification of vestibular disorders.
- American Physical Therapy Association. Vestibular rehabilitation clinical practice guideline.
- Royal College of Physicians. Falls and balance guidance.
Reviewed by Pulse Atlas Editorial Board (). Published 2026-07-30; next review 2027-07-30.
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In practice, in London
The honest picture around dynamic visual acuity testing in London
With dynamic visual acuity testing, the London question is usually about report turnaround and the radiologist reading it — not whether the scan is available. Waiting lists on the NHS for dynamic visual acuity testing vary widely by borough and by how the GP letter reads. Privately in London, we can normally offer a slot inside the same week, sometimes within 48 hours if there’s a cancellation. The difference isn’t clinical quality — the consultants are frequently the same faces you’d see on the NHS — it’s the calendar.
In practice, a private dynamic visual acuity testing appointment in London means a named consultant, a proper hour in the room (or the equivalent on a video call), and a report you can actually read. Most of the imaging suites and endoscopy units we use sit within a mile of Harley Street or in Chelsea and Fulham, and turnaround on findings is measured in days, not weeks. For dynamic visual acuity testing specifically, the difference between a routine report and a sub-speciality read is where private care earns its keep.
Fit matters more than people expect. For dynamic visual acuity testing, the right consultant depends on what you actually need — a second opinion, a definitive diagnosis, a bridge into treatment, or reassurance that nothing’s being missed. We match on that, not on who has the biggest brochure. If a test isn’t the right next step, we’ll say so before you book anything.