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Vestibular Evaluation


Videonystagmography (VNG) or Electronystagmography (ENG)  is a battery of tests that examines the cause of imbalance, dizziness, or other balance disorders by evaluating the function of the inner ear.  During this test, goggles are placed around the eyes to record eye movements. (Please note: if you wear eye makeup, it will need to be removed in order to obtain reliable results.) VNG testing is only done at our Lake Boone Trail location.

The test consists of three parts and takes approximately two hours to complete. During the first part of the test, the patient is asked to track lights on a lighted bar. Then, the patient is moved into different head and body postions. Finally, the patient’s ears are irrigated with cool and warm air. This process allows audiologists to measure involuntary back-and-forth eye movements called nystagmus. The cooling and warming effect of the air may cause a few minutes of dizziness.

Because certain medications may change the results of an VNG exam, we ask that you refrain from taking any non-essential medications for 48 hours before your appointment time. If you have any questions about the medications you should or should not take before your exam, please speak with your physician and we will be happy to provide any clarification.

Please avoid taking medications from the following categories:

  1. Anti-histamines
  2. Anti-dizziness pills
  3. Cold and allergy medications
  4. Sleeping pills
  5. Tranquilizers
  6. Pain medications
  7. Alcoholic beverages
  8. Caffeine, including diet pills – please limit yourself to one small cup of coffee the day of the exam.
  9. Diuretics / water pills
  10. Narcotics and barbiturates
  11. Herbal remedies (including Gingko Biloba and Valerian)
  12. Sedatives
  13. Muscle relaxants
  14. Anti-anxiety / Anti-depression meds only if allowed by prescribing physician


  • Heart medications
  • Blood pressure medications
  • Thyroid medications
  • Diabetes medications
  • Seizure control medications


Please do not eat for three hours prior to your VNG test. If you are medically unable to go for three hours without food, then you may have a light snack. You may wish to bring a snack with you to eat when the testing is complete.

We want to provide excellent services for our patients; for this reason, we ask our patients not to send their medical questions to us through our social media pages. Patients may send questions via our secure, encrypted server on our patient portal, or they may call our office for assistance.

Failure to cancel your appointment within 48 hrs will result in a $200 charge.