User manual

1) First, check whether the 35 mm lens (without a focusing arm or ring) has

been installed. The 25 mm lens (with a long focusing arm) may be useful

for distances closer than about 40 cm.

2) For the Desktop Mount, check that the camera is set to the horizontal

position – the elongation of the camera should be parallel to the top of

the mount (see the figure below). If not, please loosen the Camera Screw

and move it to the top end of the slot. Hold the camera with its

elongation parallel and level with the top of the mount and tighten the

screw.

3) The camera and illuminator should be placed at a distance of 40 to 70

cm from the observer (measured from the front end of the Camera Screw

to the rear/distal end of the chinrest pad). The ideal tracking distance is

from about 50 to 55 cm.

4) If using the Desktop Mount, the Camera Screw should be roughly aligned

to the center of the monitor. You should also raise the Desktop Mount so

that the top of the illuminator is as close as possible to the lower edge of

the visible part of the monitor for maximum eye tracking range.

5) Start the EyeLink Host PC application and click “Set Options” button.

Check that the “ELCL Configuration” is set to “Desktop (Level)”.

Figure 3-5: Parts of the EyeLink 1000 Desktop Mount

6) Ensure the lens cap has been removed from the camera by pulling the

cap outwards while holding the camera.

7) If you are using the chinrest supplied by the SR Research Ltd., please

install the forehead rest to the chinrest if you haven’t done so yet.

52 An EyeLink 1000 Tutorial: Running an Experiment