Also known as Videonystagmography (VNG). This diagnostic tool is capable of directly observing and recording eye movements during specific conditions. It does this with the use of 2 infrared video cameras mounted in a pair of goggles and worn by the patient during the testing.

How our eyes move under different conditions of patient position and gaze can give us important information concerning a patient’s ability to coordinate eye and head movement and maintain a stable image when moving through space. The patient’s ability to track objects and maintain a stable image as they are walking or running is an important factor in their ability balance themselves under different environmental conditions.

Abnormal eye movements under these varying conditions also suggest various pathological conditions that may be present and helps in making a more accurate diagnosis.