VNG Examination

Videonystagmography (VNG)

VNG Mask
VNG Mask

Videonystagmography (VNG test) is one of the more common balance tests and records your eye movements. It can be carried out using video goggles. An VNG test is performed because the balance systems in the inner ear control the movement of our eyes very precisely and a problem with the balance centres in the ear or brain can cause abnormalities in our eye movement. VNG has become a standard in balance assessment and uses infrared video technology to record eye movement while the patient’s eyes are open in darkness. Completing testing in dark minimizes the possibility that nystagmus will be suppressed by visual fixation. VNG technology may be used when conducting oculomotor tests, positional and positioning tests, and/or caloric tests. The most important and useful is caloric test.

Caloric test

The caloric test involves you having a flow of small amount of pressurized air into your ears to modify the temperature of the balance organs in your inner ear. This test temporarily creates a small difference between the balance systems in the left and right sides of your head respectively. This test will confirm that your vestibular system for each ear is working and responding to stimulation. It can make you feel dizzy for a few minutes but will help diagnose problems with the balance mechanism in the ear.
If you are having vertigo or any issues with your balance system use online booking  and make an appointment for VNG test!

How to prepare for VNG test?

When you have an appointment to have your balance or dizziness symptoms evaluated, there are few steps you will need to take prior to the videonystagmography.
Medications listed below will negatively affect your test results.  Stop taking the following medications/products 48 hours before your scheduled appointment only after consultation with your physician who prescribed them:
  •  Dizziness medications (Antivert, Meclizine, Valium, Scopolamine)
  •  Sedatives (sleeping medications)
  •  Muscle relaxants
  •  Tranquilizers
  •  Antihistamines (including allergy medications)
  •  Antidepressants
  •  Caffein (coffee, tea, energy drinks)
  •  Anxiety medications
  •  Alcohol
  •  No smoking for 2 hours before test

If you cannot go without a medication listed above, inform us during the visit.

Please do not eat or drink anything for 1 to 2 hours before your scheduled appointment. Be aware that no eye makeup or eyelash extensions can be worn during the test (!). Tattooed eyeliner must be covered with foundation. We also recommed that you wear comfortable clothing. After the balance test is performed, you will have an appointment with doctor to review your test results, along with your symptoms and any other diagnostic tests performed, to reach a diagnosis. A  follow-up appointment may be needed.
If you have any questions regarding these instructions, please do not hesitate to contact our practice.