VNG tests evaluates the patient’s inner ear and central motor functions. It examines the patient’s ability to make fast eye movements, slow tracking of an object, the presence of nystagmus (repetitive, uncontrolled eye movements) and hold gaze in certain eye and body positions, with or without fixation. These tests will indicate whether there is a central component involved, such as a neurological issue. For these tests the patient will follow a series of instruction, including looking at a small light, following the light as it moves and changing into different body and head positions. The tests are relatively easy to complete and does strain the patient. It can even be done on younger children.