• Tobii Pro Spectrum is Tobii's most advanced screen-based eye tracker, developed specifically for intensive scientific research where extremely precise eye movement measurements are required.

• It is intended for research on anything from traditional fixation and saccade analysis to more complex studies on tremors, pupil dynamics, eye openness, micro-saccades, and cognitive processing. Tobii Pro Spectrum is considered one of the best eye tracking systems for behavioral and neurological research, with sampling rates of up to 1200 Hz.

• Tobii Pro Spectrum is designed for experiments carried out in front of a display or controlled real-world stimuli, in contrast to wearable eye trackers that capture gaze during free movement

How Does Tobii Pro Spectrum Work?

The participant simply sits in front of the eye tracker while infrared illuminators and dual high-speed cameras continuously monitor both eyes.

The system uses video-based pupil and corneal reflection eye tracking, automatically selecting between:

• Bright-pupil illumination mode

• Dark-pupil illumination mode

depending on environmental conditions and participant characteristics.

This adaptive approach helps maintain high-quality tracking across a diverse range of participants, including those wearing corrective lenses.

Tobii's 3D Eye Model

At the core of the system is Tobii's patented 3D eye model, which continuously estimates eye position in three-dimensional space.

Combined with:

• Embedded image processing

• High-speed stereo eye cameras

the tracker captures:

• Gaze position

• Pupil diameter

• Eye openness

• Gaze origin

• Eye images

with exceptional precision and minimal latency.

The fully embedded processing architecture ensures that eye tracking calculations occur within the device itself, reducing dependence on the host computer and providing highly stable data collection.

Flexible Research Setups

One of Tobii Pro Spectrum's greatest strengths is its flexibility.

Researchers can conduct experiments using:

• Standard computer monitors

• Large displays

• Physical objects

• Custom experimental setups

The system supports:

• Head-supported studies

• Head-free studies

while maintaining excellent tracking robustness during natural head movements.

Research Applications

Because of these capabilities, Tobii Pro Spectrum has become a preferred choice for laboratories studying:

• Visual attention

• Reading

• Language processing

• Decision-making

• Cognitive neuroscience

• Developmental psychology

• Human-computer interaction

• Many other research domains

Summary

With sampling rates of up to 1200 Hz for intensive scientific study, Tobii Pro Spectrum is the company's most sophisticated screen-based eye tracker. The system provides accurate eye movement measurements across a variety of controlled experimental setups and supports both head-supported and head-free studies through the use of video-based pupil and corneal reflection eye tracking, adaptive bright-pupil and dark-pupil illumination, Tobii's patented 3D eye model, embedded image processing, and high-speed stereo eye cameras.

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.