Videonystagmography (VNG) Test
Videonystagmography (VNG) is a test that measures involuntary eye movements called nystagmus. It helps find out if you have a balance disorder in your inner ear (vestibular system).
What this test measures
VNG measures a type of eye movement you can't control, called nystagmus. These movements can be side to side, up and down, or in a circle. The test checks how your eyes respond to head movements to see if your balance system is working properly.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Frequently asked questions
What does VNG stand for?
VNG stands for videonystagmography.
What is nystagmus?
Nystagmus is a type of eye movement you can't control. Your eyes may move side to side, up and down, or in a circle.
What conditions can VNG help diagnose?
According to MedlinePlus, VNG can help diagnose benign paroxysmal positional vertigo (BPPV), Meniere's disease, labyrinthitis, vestibular neuritis, and acoustic neuroma.
What does an abnormal VNG result mean?
An abnormal result may mean you have a disorder of the vestibular system in your inner ear. It could also indicate a condition affecting parts of your brain that control balance.
Will I need more tests after VNG?
Yes, according to MedlinePlus, you may need more tests, including other balance tests, to confirm a diagnosis.
Related lab tests
Sources
- MedlinePlus: Videonystagmography (VNG) — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.