How Accurate Is Tobii Pro Spark?

Tobii Pro Spark screen-based eye tracker used for usability testing, education, and human-computer interaction research

Despite being Tobii's entry-level research eye tracker, Tobii Pro Spark uses many of the same technologies as the company's high-end devices. The device provides dependable fixation data appropriate for the majority of behavioral and usability investigations, with an approximate gaze accuracy of 0.45° and an RMS precision of 0.26° under ideal circumstances.

Accuracy & Precision

Under optimal conditions, Tobii Pro Spark delivers:

  • Approximately 0.45° gaze accuracy

  • 0.26° RMS precision

These performance levels provide reliable fixation data suitable for:

  • Behavioural studies

  • Usability studies

What Technologies Help Maintain Tracking Quality?

Tobii Pro Spark incorporates several technologies to maintain reliable eye tracking performance across different participants and environments.

Patented 3D Eye Model

Tracking performance is supported by:

  • Tobii's patented 3D eye model

The model continuously estimates the position of the participant's eyes in three-dimensional space.

Automatic Illumination

The system automatically selects between:

  • Bright-pupil illumination

  • Dark-pupil illumination

This allows the eye tracker to adapt to varying participant characteristics and lighting conditions while maintaining stable gaze estimation.

Single-Camera Design

The single-camera design provides:

  • Good tolerance for natural head movement

  • A compact device design

  • An affordable solution

Blink Recovery

Tobii Pro Spark features:

  • Immediate blink recovery

This allows eye tracking to resume within a single frame after a blink, minimizing data loss during normal participant behaviour.

Embedded Eye Tracking Processing

Tobii's embedded processing performs all gaze calculations directly within the hardware.

This helps the tracker maintain:

  • Consistent performance

  • Stable gaze calculations regardless of the host computer's processing load

Summary

Tobii's patented 3D eye model, automatic bright-pupil and dark-pupil illumination, a single-camera design, instantaneous blink recovery, and embedded eye tracking processing that carries out gaze calculations directly within the hardware enable Tobii Pro Spark to deliver roughly 0.45° gaze accuracy and 0.26° RMS precision while maintaining dependable tracking.

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.