Eye tracking allows for monitoring of eye position during the course of a scan. Our tracker employs the bright pupil technique: under direct coaxial illumination, the eye acts as a retroreflector as infared light reflects off the retina to create a corneal reflection (CR). The position of the resulting contrast is monitored over time by the camera.
The system is manufactured by Applied Science Laboratories (ASL) and is the LRO-6.
It operates by direct video imaging of the pupil, providing a near-continuous (60 Hz) x/y pupil location and pupil size.
Software and manuals for the device are stored on the CfN cluster at:
The control components are located outside the HUP6 Scanner Room. They include the following: