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If the wrong ear or wrong temperature was tested by mistake, a message will appear at the end of the
subtest asking if the wrong test was performed. Options for switching to the appropriate ear or temperature
will be available when this message appears. This change is only available upon completing the test and
cannot be changed thereafter.
Caloric tests can display the eye position tracings, pods diagram and optional bar graph, Freyss diagram,
Claussen graph, Haid stoll graph, total amplitude, or result table. Unilateral weakness, directional
preponderance and cumulative slow phase velocity information will be present in the upper right corner of the
summary screen.
When using a reclined chair, ensure it is in a reclined position and locked before the test. Operational steps
may vary according to the type of chair system used. Refer to the below steps for Nydiag 200, System 2000,
and Orion Reclining.
Chair Type
Nydiag 200 rotary chair
System 2000 reclining chair
Orion Reclining chair
Figure 3.9-3 Reclined chair for caloric testing with caloric angle marker and inclination dial
3.9.1.6
Oculomotor tests
The oculomotor tests include Gaze, Smooth Pursuit, Random Saccade, Saccadometry, and Optokinetic
tests. These tests are performed with the goggle cover removed so that the patient can follow targets as they
move around on the TV, projector screen, or with the laser projected on the booth enclosure wall. During
Gaze tests, the patient will fixate on stationary targets that are positioned at center, right, left, up and down.
Random Saccade tests allow the target to move randomly in a horizontal, vertical or mixed pattern while the
patient follows the target with his/her eyes. Smooth Pursuit tests the patient's ability to track a target that
moves in a sinusoidal pattern across the screen. The target speed will increase from 0.1 Hz to 0.5 Hz in
0.1 Hz steps. The Optokinetic test is used to examine eye movements during stimulation from a large moving
checkerboard pattern or stripe pattern produced by the optokinetic drum along the booth wall. All oculomotor
tests will display real-time graphical data to help the clinician interpret the results for each individual test.
D-0134090-A – 2022/11
VisualEyes™ - Instructions for Use - EN
Steps before a caloric test
Recline the chair using the inclination dial that displays the current chair
angle (positioned near the top of the chair frame).
Engage the foot brake to prevent the chair from rotating.
Recline the chair to thirty degrees above horizontal using the angle
marker below the seat before performing the test.
Recline the chair to thirty degrees above horizontal using the angle
marker below the seat before performing the test. Lock the chair from the
VisualEyes™ software.
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