VIsualEyes 515/525 - Additional Information Page 12
2 Calibration
Calibrations are particularly important in tests where eye movements are compared with a given stimulus of
a known position and/or velocity (e.g. Saccade test). Calibration can be performed on both eyes (binocular)
or individually (monocular) by turning off the non-essential eye or using a monocular goggle. Calibration is
strongly recommended for all tests to accurately measure the velocity of the nystagmus.
2.1 Performing calibration
In the test screen side panel, click the Calibration button (Figure 2.1.1)
Figure 2.1.1 Calibration button
The Calibration dialog box will open (Figure 2.1.2)
Figure 2.1.2 Calibration screen
Before beginning calibration, center the calibration stimulus for the patient using the target center slider.
Vertical tests will still display the target from the center of the screen, but horizontal tests will display the
target centered at the target center position specified by the target center slider. (Figure 2.1.3)
Figure 2.1.3 Target Center slider
The upper area of the dialog box shows the video images of the eyes that are being calibrated. If necessary,
adjust the pupil threshold to achieve optimal eye detection.
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