Tobii’s patented 3D eye model delivers high-caliber gaze data
Two eye tracking cameras, taking up to 250 images per second
Bright and dark pupil illuminators offer superior data regardless of eye shapes, ethnicity or age
Fully embedded processing and illumination control enables the system to work autonomously
Maintains high accuracy and precision during subjects' natural head movements
Captures pupil data at the same sampling rate as the gaze data
Eye tracking technique Video-based pupil- and corneal reflection eye tracking with dark and bright pupil illumination modes. Two cameras capture stereo images of both eyes for robust accurate measurement of eye gaze and eye position in 3D space, as well as pupil diameter
Sampling frequency
30, 60, 120, 250 Hz (max. frequency depends on hardware version)
Binocular eye tracking
Yes
Hardware versions
60Hz
120Hz
250Hz
Blink recovery time
1 frame (immediate)
Data sample output
Timestamp,
Gaze origin,
Gaze point,
Pupil diameter
TTL input stream
Not available
Operating system
Windows, Mac, Linux
Precision
0.04° RMS at optimal conditions
0.2° RMS in optimal conditions (raw signal)
Accuracy
0.3° in optimal conditions
Monocular calibration
Yes
Eye tracker latency
Mean latency < 13 ms @ 250 Hz (SD < 1.2 ms)
Gaze recovery time
250 ms
Eye image data stream
Eye image data stream frequency is approximately 4 Hz (one image per eye). Zoomed-in eye images available in tracking mode
Full-frame camera images are available in gaze recovery mode
Tracker and client time synchronization
Integrated between the eye tracker time domain and the client computer time domain
