Videonystagmography (VNG) is a comprehensive balance test used to determine if inner ear functions are the cause of balance disorders. A VNG is a series of tests that examine the involuntary movement of the eyes known as nystagmus. The movements are recorded through infrared cameras in the form of goggles placed over the eyes. VNG is one of the only tests that can determine if the problem is unilateral (one ear) or bilateral (both ears). Consult with Dr. Lee to see if a VNG can be helpful to diagnose your balance issues.