User manual

dotted line does not appear horizontally centered, move the Desktop Mount to

the left or right or rotate the angle of the Desktop Mount slightly. Important,

even if the binocular mount is used for monocular eye tracking, the dotted

line should also be aligned with the center of the face.

Figure 3-14. Camera Setup Screen Desktop Mount

(Angled), Binocular Recording

IMPORTANT: If the camera image is tilted 45 degrees clockwise, please check

whether the “ELCL Configuration” setting in the “Set Options screen” is set to

“Desktop (Angled)”. If the camera image is tilted 45 degrees counterclockwise,

check whether the camera is set to the oblique position on the Desktop Mount.

In the global view window of the camera image, move the Host PC mouse cursor

on top of the pupil position and double click on the left mouse button. The

camera image for the selected eye should now be displayed in the zoomed view.

If the pupil is detected, a green box and the cross now will be drawn on the eye

image.

Please note that for most subjects, you will just need to adjust the height of the

chinrest and chair to get the intended camera image without changing the

Desktop Mount settings. However, for subjects wearing glasses, depending on

the shape and reflection of the glasses, you may need to make slight

adjustments to the Desktop Mount (e.g., move the camera slightly forward or

backward, and adjust the angle of the illuminator and camera) so that

reflections from the glass will not interfere with pupil acquisition. The left panel

of the following figure illustrates a good camera setup whereas the reflections in

the right panel block the pupil image, especially when the subject looks in the

direction of the glass reflection.

64 An EyeLink 1000 Tutorial: Running an Experiment