User manual

Figure 3-6. Camera Setup with Subjects Wearing

Glasses (the EyeLink 1000 Monocular Mount).

If the image becomes too dark or too light, wait one second while the auto-

contrast adjusts itself. If the blue thresholded area in the display is interfering

with setup, press the “Threshold Coloring” button (or ‘T’ on the keyboard) to

remove the threshold color overlay. In TRACK.EXE, you can use keys on either

the Display or Host PC to perform all keyboard shortcut operations while the

eye image is displayed.

Poor Focus

Good Focus

Figure 3-7: Focusing the Desktop Mount Camera

The camera should be focused by rotating the lens holder. Turn the lens by

placing your thumb on the bottom of the lens and turning the lens holder by

sliding your index finger along the top of the camera. This will keep your fingers

away from the subject’s eyes, and prevent the camera image or the illumination

to the eye from being blocked. Look closely at the eye image on the zoomed view

while adjusting the position of the focusing arm until the eye image is clear. If a

yellow circle (CR signal) appears near the pupil, the best focus will minimize the

size this yellow circle.

54 An EyeLink 1000 Tutorial: Running an Experiment