otometrics ICS Impulse USB User Manual page 11

4. Position the ROI (Region of Interest) around the pupil:
– click on the green box and drag to center it on the pupil, or
– click on the pupil to center the pupil inside the green box.
Video
5. In the
Note
If video recording the eye, select
•
6. If the pupil was not automatically detected, select
7. Ask the patient to stare at the fixation dot. Assess pupil tracking by observing the cross-hair: If the cross-hair fails to
track the pupil (jumps around and does not stay centered on the pupil), move the threshold slider to adjust.
Pupil detection ensures that the system tracks the pupil properly during calibration and when collecting data.
Note
When
•
the white circular image of the pupil.
OK
8. Select
9. Continue to (
Otometrics - ICS Impulse USB
window, choose the type of image displayed:
Grayscale Image
Image Display Pupil Location
is set to
to accept the ROI position.
Calibrate ► 13 ).
Grayscale Image
(A) or
.
Auto Threshold
. The system centers the cross-hair on the pupil.
, make additional adjustments to remove any white areas outside
User Guide
Pupil Location
(B).
11