D-0134090-A – 2022/11
VisualEyes™ - Instructions for Use - EN
Page
71
Top mount goggle
:
If using the top mount goggle, the images can be centered from the software by using the center eyes button
from the eye tools menu, as described in section 3.6.3.
Front mount goggle
:
If using the front mount goggle, use the center eyes button in the eye tools menu and manually adjust the
camera in the goggle viewport. Ensure that the “UP” sticker on the camera is pointing upwards.
EyeSeeCam goggle
:
If using the EyeSeeCam goggle, align the camera by rotating it in its ball-and-socket joint such that the eye is
centered in the image. The camera can be rotated in three directions: yaw, pitch, and roll. Only rotate the
camera in one of these three possible directions at a time. After the eye is centered in one direction, e.g. in
the horizontal direction, choose the next rotation direction, e.g. the vertical direction.
A possible alignment sequence to center the is shown below:
Figure 3.6-1: Centering the pupil in the image for the EyeSeeCam goggle, with a sequence of three camera rotations
3.6.2 Focus adjustment
To optimize the pupil detection, the camera should be focused. This is done by turning the knobs/lens as
described for the selected goggles in section 2.6.1, and shown in
. Turn the knob clockwise or
counterclockwise while watching the image on the screen. Stop turning the knob when the pupil outline and
iris pattern is clear, even if the eye surroundings may be blurry at this point. The infrared reflections will be
the smallest when the cameras are in optimal focus. With binocular goggles, each camera must be adjusted
separately.
NOTICE:
If the image is not optimally focused, the eye tracker may fail to adequately record the eye
movements, which in turn may lead to poor results.
Figure 3.6-2: Focus adjustment on the different VNG and vHIT goggles
3.6.3 Eye tools menu
When touching or hovering the mouse over the eye images in the test screen, the
Eye tools menu
will
appear. The Eye tools menu contains five buttons:
1.
Toggle Right Eye:
Enable/disable image and eye tracking for the right eye.
2.
Click to center eyes:
Centers the eyes in the images (only available with the top mount and front
mount goggles).
3.
Click to select eye tracker:
Allows the operator to select the eye tracker to be used.
