A videonystagmography (VNG) is designed to determine the source of dizziness or balance disorders, it tests inner-ear and central motor functions. We test with the latest technology available, using infrared video cameras to record involuntary eye movements called nystagmus. The VNG test is comprised of three subtests:
1. Ocular motility testing
You will be asked to follow a light with your eyes only. The test will include portions where the light stands still, moves slowly, and jumps to random positions. These tests may indicate a central or neurological problem, or a problem connecting the vestibular system to the brain.
2. Positional/Positioning testing
You will be asked to move your head and body into various positions. These tests are looking at the inner ear system and the condition of the endolymph fluid in the semicircular canals.
3. Caloric testing
Your ears will be stimulated with warm and then cold air, independently. This test assesses the vestibular system for each ear and reveals whether they are working and responding to stimulation. This test is the only test available that can determine whether a vestibular deficit is unilateral or bilateral.