LiveTrack is a broad line of eye trackers for research applications made by Cambridge Research Systems.  The range includes:

• LiveTrack Lightning, the newest addition – a competitively-priced unit for high-speed 500 Hz tracking in the laboratory or in the scanner
• LiveTrack AV, a modestly-priced eye-tracking system for 60 Hz point of gaze monitoring inside the scanner
• LiveTrack FM, a modestly-priced eye-tracking unit recommended for 60 Hz point of gaze monitoring