The Tobii Pro Spark is a small and portable screen-based eye tracker with a default sampling rate of 60 Hz and an additional 33 Hz mode for particular use cases. It uses video-based pupil and corneal reflection eye tracking with automatic bright-pupil and dark-pupil illumination, and a single Tobii EyeSensor™ camera to track both eyes simultaneously. The system supports binocular eye tracking with accurate measurement of gaze position, gaze origin and pupil diameter over the course of an experiment.

Eye Tracking Technology

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

• Bright-pupil illumination

• Dark-pupil illumination

The system uses:

• One Tobii EyeSensor™ camera

This enables:

• Binocular eye tracking

• Gaze position measurement

• Gaze origin measurement

• Pupil diameter measurement

throughout an experiment.

Eye Tracking Specifications

Tobii Pro Spark supports the following sampling frequencies:

• 60 Hz (default)

• 33 Hz (for specific use cases)

The system is designed for fixation-based behavioural research while maintaining efficient data collection.

Performance Specifications

Under optimal laboratory conditions, Tobii Pro Spark delivers:

• Gaze accuracy: Approximately 0.45°

• Precision: 0.26° RMS using built-in filtering algorithms

• Immediate latency: One frame

• Instant blink recovery

• Gaze recovery: Approximately 50 milliseconds

These characteristics ensure stable data collection for fixation-based studies.

While it is not intended for high-frequency saccade or microsaccade research, its performance is suitable for:

• Cognitive psychology

• Usability

• Education

• Behavioural research

Participant Freedom

The system supports:

• Participant distance: 45–95 cm

At typical viewing distances of 65–80 cm, Tobii Pro Spark provides:

• Head movement box: Approximately 35 × 35 cm

This allows participants to move naturally without losing tracking.

Participant setup typically requires:

• Less than one minute

making the system particularly suitable for classroom environments and high-throughput research studies.

Display Compatibility

Tobii recommends:

• Displays up to 27 inches

The optional tripod stand also enables studies involving:

• Larger screens

• Real-world objects

Hardware & Connectivity

Tobii Pro Spark features:

• Dimensions: 28.5 × 1.5 × 2.2 cm

• Weight: 97 g

• USB 2.0 Type-A connectivity

• USB-C adapter included

• Dedicated Tobii EyeChip™ ASIC

• Embedded eye tracking processing

• Power consumption: Less than 2 W

• USB-powered operation

Summary

In order to provide dependable eye tracking for fixation-based behavioral, educational, and usability research, Tobii Pro Spark combines video-based pupil and corneal reflection eye tracking, automatic bright-pupil and dark-pupil illumination, a single Tobii EyeSensorTM camera, 60 Hz and 33 Hz sampling modes, approximately 0.45° gaze accuracy, 0.26° RMS precision, a 35 × 35 cm head movement box, USB 2.0 Type-A connectivity, an embedded Tobii EyeChipTM ASIC, less than one minute participant setup, and support for Windows, macOS, and Linux.

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.