60
An EyeLink 1000 Plus Tutorial: Running an Experiment
©
2013-2017 SR Research Ltd.
7)
Start the EyeLink Host PC application and go to the “Set Options” Screen.
Click “Configuration” and make sure the option “Desktop ~ Stabilized Head
~ Monocular ~ 35mm lens | MTABLER” is selected.
8)
Now go to the camera setup screen. Set the “Illuminator Power” level in the
lower-left corner of the screen to 75%.
Figure 3-2: Parts of the EyeLink 1000 Plus Desktop Mount
Ask the participant to be seated. Adjust the height of the chair so that the
participant is comfortable and their eyes are aligned to the upper quarter of the
monitor. Ask the participant to lean her/his forehead against the forehead rest
and adjust the height of the chinrest so that the participant’s chin rests
comfortably on the chin rest pad while maintaining the eye alignment to the top
25% of the screen. If necessary, loosen the big knob on the Desktop Mount to
adjust the angle of the camera so that the eye to be tracked appears in the
center of the global view of the camera image. Now tighten the knobs.
In the global view window, the eye to be tracked should appear in the center of
the camera image whereas the untracked eye should appear near the edge or
outside of the camera view. To avoid accidental tracking of the unintended eye,
enable the search limits. Move the Host PC mouse cursor on top of the tracked
eye and click on the left mouse button. The camera image for the eye should
now be displayed in the zoomed view. If the pupil is detected, a red box and the
crosshair will now be drawn on the eye image.
Please note that for most participants, 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 participants wearing glasses, depending
on the shape and reflection of the glasses, you may need to make slight
adjustments to the Desktop Mount (e.g., moving the camera closer to the
participant, lowering the position of the camera, and/or adjusting the angle of