Professional-grade eye tracking equipment is combined with a small, lightweight design in the Tobii Pro Fusion. Depending on the hardware version, the system supports sampling frequencies of 30 Hz, 60 Hz, 120 Hz, and 250 Hz, enabling researchers to choose the temporal resolution most appropriate for their investigations. While retaining effective data collection, the maximum 250 Hz sampling rate allows for in-depth examination of fixations, saccades, smooth pursuit, blink behavior, pupil dynamics, and other aspects of eye movement.

Eye Tracking Technology

Tobii Pro Fusion employs video-based pupil and corneal reflection eye tracking using both:

• Dark-pupil illumination

• Bright-pupil illumination

The system uses:

• Two Tobii EyeSensor™ cameras

These cameras capture stereo images of both eyes, enabling:

• Binocular gaze estimation

• Pupil diameter measurement

• Three-dimensional gaze origin calculation

The patented 3D eye model contributes to the system's excellent robustness across different participant populations and environmental conditions.

Eye Tracking Specifications

Tobii Pro Fusion supports the following sampling frequencies (depending on hardware version):

• 30 Hz

• 60 Hz

• 120 Hz

• 250 Hz

The maximum 250 Hz sampling rate enables detailed analysis of:

• Fixations

• Saccades

• Smooth pursuit

• Blink behaviour

• Pupil dynamics

• Other eye movement characteristics

Performance Specifications

Under optimal conditions, Tobii Pro Fusion delivers:

• Gaze accuracy: Approximately 0.3°

• Precision: 0.04° RMS (filtered)

• Raw precision: 0.2° RMS

• Mean latency: Below 13 milliseconds at 250 Hz

• Immediate blink recovery: Within a single frame

• Gaze recovery: Within approximately 250 milliseconds

These characteristics make Tobii Pro Fusion suitable for both behavioural experiments and many neuroscience applications.

Participant Freedom

The system supports:

• Operating distance: 50–80 cm

• Head movement box: Approximately 40 × 25 cm at 65 cm viewing distance

This provides flexibility while maintaining reliable eye tracking performance.

Display Compatibility

Tobii Pro Fusion is optimized for:

• Displays up to 24 inches

The system can also be:

• Mounted on a tripod to investigate larger displays

• Mounted on a tripod to investigate physical objects

Hardware & Connectivity

Tobii Pro Fusion features:

• Weight: 168 g

• USB Type-C connectivity

• Fully embedded processing

• Three Tobii EyeChip™ ASIC processors

Operating System Support

Tobii Pro Fusion supports:

• Windows

• macOS

• Linux

Summary

Tobii Pro Fusion combines video-based pupil and corneal reflection eye tracking, dark-pupil and bright-pupil illumination, two Tobii EyeSensor™ cameras, sampling rates from 30 Hz to 250 Hz, 0.3° gaze accuracy, 0.04° RMS filtered precision, 0.2° RMS raw precision, sub-13 millisecond latency, a 40 × 25 cm head movement box, USB Type-C connectivity, three Tobii EyeChip™ ASIC processors, and support for Windows, macOS, and Linux to deliver professional-grade eye tracking for behavioural and neuroscience research.

If you want to learn more about eye tracking technologies connect us on www.tidentech.com or feel free to ask us on parag@tidentech.com or tidentech@gmail.com call us on +91 9987442274.