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Vestibular Function Testing vs. Vestibular Evaluation: What's the Difference?
Melissa Chaudoin DPT, AIB-VRC
7/5/20264 min read
If you've been told, "You need vestibular testing," you may be wondering exactly what that means.
One question I get as a vestibular physical therapist is:
"Should I have vestibular function testing before starting physical therapy?"
The answer depends on your symptoms, your diagnosis, and your treatment goals.
Although vestibular function testing and a vestibular evaluation sound similar, they serve very different purposes. Understanding the difference can help you make informed decisions and, in many cases, start treatment sooner instead of waiting months for specialized testing.
What Is Vestibular Function Testing?
Vestibular function testing is a collection of specialized diagnostic tests that objectively measure how well your inner ear balance organs and vestibular nerves are functioning.
These tests are typically performed by an audiologist or ENT physician with specialized equipment.
Common vestibular function tests include:
Video Head Impulse Test (vHIT)
Caloric testing
Rotational chair testing
Vestibular Evoked Myogenic Potentials (VEMPs)
Eye movement testing (oculomotor testing)
Positional testing
Unlike a clinical examination, these tests produce objective measurements of vestibular function.
For example, vestibular function testing may show:
One inner ear is functioning significantly less than the other.
Both vestibular systems have reduced function.
One branch of the vestibular nerve is affected while another remains normal.
Vestibular function has declined since previous testing.
This information helps your healthcare team better understand how your vestibular system is functioning and can influence important medical decisions.
What Should You Expect During Vestibular Function Testing?
Depending on which tests are ordered, you may be asked to:
Wear goggles that record your eye movements.
Follow moving lights or targets with your eyes.
Move your head quickly in different directions.
Lie in different positions while eye movements are recorded.
Have warm and cool air or water placed into each ear during caloric testing.
Sit in a computerized rotational chair.
Listen to sounds while small sensors measure muscle responses.
Some tests intentionally provoke dizziness for a short period of time. While this can be uncomfortable, it provides valuable diagnostic information about how your balance system responds.
Most people recover quickly after testing, although temporary dizziness or fatigue is common for the remainder of the day.
When Is Vestibular Function Testing Recommended?
Not everyone experiencing dizziness needs vestibular function testing.
In many cases, a thorough clinical evaluation provides enough information to begin treatment successfully.
However, vestibular function testing can be extremely valuable when:
Your diagnosis remains unclear.
Your symptoms don't match a typical vestibular condition.
Your recovery is not progressing as expected with vestibular rehabilitation.
Your physician is considering treatments that intentionally reduce vestibular function, such as gentamicin injections or surgery.
You have a condition such as Meniere's disease, where monitoring vestibular function over time may help guide treatment decisions.
Your healthcare team needs objective measurements to determine the best course of care.
In these situations, vestibular function testing often provides information that cannot be obtained through a physical examination alone.
What Is a Vestibular Evaluation?
A vestibular evaluation performed by a vestibular physical therapist answers a different question:
How is your dizziness affecting your ability to move, see clearly, maintain your balance, and participate in daily life?
Rather than measuring the function of the inner ear itself, a vestibular evaluation focuses on how your body is responding to the problem.
During your evaluation, your vestibular physical therapist may assess:
Eye movements
Balance
Walking
Fall risk
Head movement tolerance
Positional dizziness
Motion sensitivity
Visual stability
Functional mobility
Your therapist also considers your medical history, symptom triggers, goals, and daily activities to develop an individualized treatment plan.
Do You Need Both?
Sometimes.
Vestibular function testing and vestibular rehabilitation are not competing services—they complement one another.
Think of it this way:
Vestibular function testing asks:
"How well is the vestibular system working?"
A vestibular evaluation asks:
"How is the vestibular problem affecting your daily life, and what can we do to improve it?"
Both pieces of information are valuable, but they answer different questions.
Should You Wait for Vestibular Function Testing Before Starting Physical Therapy?
For many people, the answer is no.
Here on Hawaiʻi Island, comprehensive vestibular function testing generally requires traveling to Oʻahu. Depending on specialist availability, this can mean waiting weeks or even months before testing is completed.
If vestibular function testing is clearly indicated, that trip is often worthwhile.
However, waiting for specialized testing before beginning vestibular physical therapy may unnecessarily delay your recovery.
Many common causes of dizziness—including benign paroxysmal positional vertigo (BPPV), vestibular neuritis, age-related balance decline, motion sensitivity, concussion-related dizziness, and persistent dizziness following an inner ear injury—can often be identified during a thorough vestibular evaluation and treatment can begin immediately.
Starting vestibular rehabilitation while waiting for additional testing may help you:
Improve balance sooner
Reduce dizziness
Lower your risk of falling
Return to normal activities more quickly
Provide additional clinical information to your physician if further testing becomes necessary
If specialized vestibular function testing later becomes necessary, the results can still provide valuable information to guide your ongoing medical care.
The Bottom Line
Vestibular function testing and vestibular evaluations each have an important role in diagnosing and treating dizziness and balance disorders.
One provides objective diagnostic information about how your vestibular system is functioning.
The other determines how those findings affect your daily life and develops a personalized rehabilitation plan to help you recover.
The best approach depends on your symptoms, diagnosis, and goals. In many cases, the most effective care includes both—but you don't always need to wait for specialized testing before beginning treatment.
Still unsure whether you need vestibular function testing or a vestibular evaluation?
Every person's dizziness is different. A comprehensive vestibular evaluation can help determine the most appropriate next step—whether that's beginning vestibular rehabilitation, referring you for additional testing, or coordinating care with your physician.
If you're in Hawaiʻi, I provide mobile vestibular physical therapy throughout Hawaiʻi Island and telehealth appointments statewide.
Schedule your evaluation today.
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Providing expert vestibular physical therapy near me for residents and visitors of the Big Island, with telehealth options available for the entire state of Hawai'i since 2025