Vertigo Balance Test (Videonystagmography - VNG)

The patient is fitted with dark goggles equipped with cameras. The patient is asked to track a light (oculomotor), and involuntary eye vibrations (nystagmus) are measured by moving the patient's head into different positions (e.g., back, right, left). In the final stage (Caloric Test), hot and cold air/water is administered into the ear to deliberately create brief dizziness.

A comprehensive VNG test battery takes an average of 45 minutes to 1 hour, depending on the subtests administered.

This is very important; you must completely stop taking dizziness medications (Vertigo pills), sleeping pills, or sedatives with your doctor's knowledge at least 48 hours before the test so they do not mask the test results. In addition, fasting for at least 3-4 hours is required to prevent nausea during the procedure.