Videonystagmography

How does the videonystagmography test work?

The test tracks how your eyes move. You wear special goggles that have a camera(s) recording your eye movements.

How do I prepare for a VNG test?

This is a safe and simple test that rarely causes side effects. But you may feel nauseated after the test. Your provider may recommend that you eat a light meal before the test to reduce the risk that you’ll feel nauseated.

The test activates part of your peripheral vestibular system. That activation can make you feel dizzy after the test, so you may want to arrange for someone to take you home.

What happens during a VNG?

You sit on an exam table or chair in a darkened exam room. The exam table reclines so you can lie back or sit up during the test. Your healthcare provider will place the goggles on your head. Then, they’ll guide you through the test. There are three parts:

1. Ocular testing: You keep your head still while you watch different dots or patterns on a TV screen.
2. Positional testing: Your provider will ask you to move your head or body in different directions. You may lie back or sit up during the test.
3. Caloric testing: They’ll send small bursts of warm or cold water or air into each ear to record nystagmus.

The test takes about an hour to complete.