Tobii Pro Fusion

Our mid-range research eye tracker is versatile and powerful, capturing gaze data at 250 Hz. Ideal for both fixation and saccade studies. Compact and easily portable, it allows for data collection in both lab settings and less controlled environments.

Using Tobii Pro Fusion in 3 easy steps

Set up

Tobii Pro Fusion is compatible with a range of standalone monitors and laptop screens up to 24” in size and connects via USB. It can also be placed on a tripod for studies of real-world stimuli.

Capture

Multiple sampling rates of up to 250 Hz allow you to collect data for eye movements such as fixations, saccades, and smooth pursuit. Additionally, you can record pupil diameter and eye openness data.

Understand

Tobii Pro Fusion works with our software, Tobii Pro Lab, supporting researchers from experiment design to data analysis. Calculate eye tracking metrics, create visual representations of data or export for further analysis in other software.

About the tech

Our patented 3D eye model delivers high-quality gaze and pupil data
Two eye tracking cameras, taking up to 250 images per second
Bright and dark pupil illumination modes automatically selected for best performance

Fully embedded processing
Easy USB or USB-C connectivity
Compatible with all main operating systems
Accurate software synchronization options with a wide range of external devices, such as EEG, ECG or GSR

Technical specifications

Eye tracking specifications

Eye tracking technique	Video-based pupil and corneal reflection eye tracking with dark and bright pupil illumination modes. Dark pupil tracking is supported in all sample frequencies. Bright pupil tracking is supported at 60 and 120 Hz. 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.
Eye tracking mode	N/A (default)
Sampling frequency	30 Hz, 60 Hz, 120 Hz, or 250 Hz (max. frequency depends on hardware version)
Precision	0.04° RMS in optimal conditions (applying Savitzky-Golay filtering, settings listed in the test report) – 0.2° RMS in optimal conditions (raw signal)
Accuracy	0.3° in optimal conditions
Binocular eye tracking	Yes
Eye tracker latency	Mean latency < 13 ms @ 250 Hz (SD < 1.2 ms)
Blink recovery time	1 frame (immediate)
Gaze recovery time	250 ms
Data sample output	Timestamp, Gaze origin, Gaze point, Pupil diameter
Eye openness data stream	Eye openness stream is available in eye tracker set to 120 Hz, 60 Hz, and 30 Hz sampling frequencies. Note that the eye openness signal is not available in 250 Hz due to the processing power limitation. Eye openness stream has the same frequency as the gaze stream and will have the same timestamps. Eye openness data is provided in millimeters for each eye individually.
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.
TTL input stream	Not available
Tracker and client time synchronization	Integrated between the eye tracker time domain and the client computer time domain.
User calibration	Binocular, Monocular

Setup

Head movement tolerance	Excellent. Dual-camera system, with more images than a one camera system, gives a more accurate data calculation and the best level of precision and robustness for head movement.
Operating distance (mounted on screen)	50 cm to 80 cm (20” to 31”) from the eye tracker
Freedom of head movement (width x height)	Freedom of head movement at 65cm distance – 40 cm × 25 cm (15.7″ × 9.84″) – Freedom of head movement at 80cm distance – 45 cm x 30 cm (17.7″ x 11.8″)
Optimal screen size	Up to 24″ (16:9 aspect ratio)
Recommended monitor	N/A
Tracker setup options	Eye tracker mounted on a tripod, allows for even larger screens or physical objects to be tracked.
Participant setup	Very simple and easy. Typically, less than 1 minute.

Software and framework compatibility

Software and framework compatibility	Tobii Pro Lab, Tobii Pro Eye Tracker Manager, Tobii Pro SDK, Any application built on the Tobii Pro SDK
Operating system	Windows, macOS, Linux

Hardware versions

Hardware versions

60Hz – 120Hz – 250Hz

Eye tracker unit

Dimensions (L x H x W)	37.4 cm × 1.8 cm × 1.37 cm (14.72“ × 0.70“ × 0.53“)
Weight	168 g (5.9 oz.)
Connectors	USB Type-C, (USB Type-A to Type-C adapter provided), AC power
Data Processing	3 Tobii EyeChip™ ASIC with fully embedded data processing
Eye tracking cameras	2 x Tobii EyeSensor™ modules
Illuminators	Dark pupil illumination modules, Bright pupil illumination modules
Power consumption	Typical power consumption: 4.3 W Max. rated power consumption: 9 W
Power options	Directly via USB Type-C connector, or with provided AC power adapter, when using a computer with USB 2.0 Type-A port