Spontaneous nystagmus test

This test checks for the presence or absence of nystagmus in a neutral position while presenting the screen without a target to the patient. In the presence of any asymmetry of the peripheral or central vestibular function, the vestibulo-ocular reflex evokes nystagmus. In the test screen, horizontal and vertical nystagmus is displayed in graphic form.

Gaze nystagmus test

This test involves the patient gazing at the target to check for the presence or absence of nystagmus. The patient is instructed to move only the direction of the eyes without moving the head. The test checks for the presence or absence of nystagmus based on vestibular or oculomotor abnormalities by instructing the patient to gaze in the upward, downward, rightward, and leftward directions. The test result is displayed in graphic form by direction of gaze.

Rapid eye movement test

This test involves displaying the targets on the right and left sides to assess the accuracy of tracking the target or eye movement angular velocity. In the presence of abnormalities in the cerebellum or brain stem, overshoot or undershoot is noted when capturing the target after rapid eye movement. In the test result screen, the movements of the targets and the eyeballs are both displayed.

Eye tracking test(ETT)

This test involves the patient tracking a moving target with just eye movement to assess the movement of the target as visual stimulation based on a sinusoidal wave. In the presence of a central nervous system disorder (especially disorders of the cerebellum or brain stem, such as spinocerebellar degeneration), a delay in eye movement to the target and rapid eye movement to complement the delay are displayed as test results.

Optokinetic nystagmus/
Pattern test(OKN/OKP)

This test is performed to examine eye movements in response to optokinetic stimuli by playing alternating black-and-white striped images. The eye movement data during the video is output as a graph. 30°/sec for OKN and 0-160°/sec for OKP are tested.

Labyrinthine fistula sign test

This test involves stimulation of the inner ear using a Politzer ball to check for any changes in eye movement associated with pressure loading. The test determines whether pressure loading is associated with the development of dizziness. Test results for the left ear (blue) and right ear (red) are displayed in a single graph.

Positional nystagmus/
positioning nystagmus test

This test detects nystagmus based on peripheral and central vestibular imbalances induced by stimulation of the otolith organs with gravity. The test is used to make a diagnosis of peripheral or central vestibular disorders or benign paroxysmal positional vertigo based on nystagmus. There are test methods available in the sitting position, decubitus position, and D-H method, and their corresponding graphs are displayed as test results.

Caloric test(Caloric)

This test involves irrigating the external auditory canal with warm or cold water, thereby generating endolymph flow in the lateral semicircular canal due to the difference between the temperature of the warm or cold water and the body temperature to observe nystagmus induced by stimulation or suppression of the lateral semicircular canal. In the test result screen, angular velocities are displayed as dots.

Vestibulo-ocular reflex test (VOR)

This test assesses the vestibulo-ocular reflex, a reflex eye movement in which the eyes move in the opposite direction of the head to maintain gaze direction during head rotation. In the presence of an affected semicircular canal, the eyes do not move and cannot maintain gaze direction to the target despite head rotation on the affected side. This results in saccadic eye movement to adjust the gaze direction. The test is performed in three patterns of DARK, LIGHT, and FIX. In the test result screen, the GAIN figure is displayed.