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An EyeLink 1000 Plus Tutorial: Running an Experiment
©
2013-2017 SR Research Ltd.
If your system is licensed to use the EyeLink Remote Mode, take the following
steps to set up the camera and perform image adjustments.
1)
For the Remote Mode, attach the 16 mm lens (shipped standard with a short
adjustable focus arm or small wheel) to the camera. The system by default is
configured to use 16 mm remote lens. Some systems may also be supplied
with a 25 mm remote lens (with a special marking on the focusing wheel).
The 25 mm lens provides better recording data quality than the 16 mm lens
at the expense of a smaller head box; the 25 mm lens is recommended when
recording at 1000 Hz.
It is important to make sure the lens settings on
the host software matches the physical lens installed on the camera.
2)
The Display PC monitor should be set such that when the participants are
seated and looking straight ahead, their eyes are level with the top quarter of
the monitor.
3)
Ideally the Desktop Mount should be placed at a distance of about 55-60 cm
from the participant’s eyes. This means that if you are using a monitor
smaller than 20’’, the Desktop Mount can be placed right in front of the
monitor with no extra space between them. If you are using a larger
monitor, it will be necessary to move the monitor back while keeping the
Desktop Mount at its optimal distance from the participant, so as to
increase the distance between the participant and the screen while still
ensuring that the eye tracker can track the participants properly (the
maximum viewing angle of the display should be within 32° horizontally and
25° vertically). In such cases, measure the distance (in millimeters) between
the lens (at the point where the lens connects to the camera) to the display
monitor and update the last screen of the “Screen Settings” configuration
tool (see section 8.4 of the EyeLink 1000 Plus Installation Guide). This step
is very important for the head movement compensation when recording the
eye position data in the Remote Mode.
4)
The Camera Screw of the Desktop Mount should be aligned with the
horizontal center of the monitor. For maximum eye tracking range, the
Mount should be raised so that the top of the illuminator is parallel with,
and as close as possible to, the lower edge of the visible part of the monitor
without blocking the participant’s view of the screen. To keep the viewing
distance relatively constant throughout a recording session, a comfortable,
high-backed, stable chair for the participant is recommended.
5)
Start the Host PC application and go to the “Set Options” screen. If your
system is licensed for remote eye tracking, you should now see to “Desktop
(Remote Mode) ~ Target Sticker ~ Monocular ~ 16/25 mm lens | RTABLER”
as one of the “Configuration” options. Select your mount type. Version 5.08