Tobii Pro X3-120, Product Description

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1 Introduction
1.1 Overview
This document describes the features and functionality of the Tobii Pro X3–120 Eye Tracker. The Tobii Pro X3–120 is a stand
alone eye tracker that can be used in various setups by attaching it to monitors, laptops or for performing eye tracking on physi-
cal objects. The eye tracker requires some assembly before first time use and after transport.
The Tobii Pro X3–120 Eye Tracker is an unobtrusive eye tracker for detailed research of natural behavior. Its large head move-
ment box allows the subject to move during recording while maintaining accuracy and precision. The Tobii Pro X3–120 Eye
Tracker offer maximum flexibility with numerous software and stimuli set-up options. The Tobii Pro X3-120 has a sampling rate
of 120 Hz.
The Tobii Pro X3–120 is a compact and light weight eye tracker measuring only 324 mm (12.7’’) in length and only 118 grams
(4.2 Oz) in weight. It enables your portable eye tracking lab and studies that require an eye tracker to track even large objects at
close distances. Use the eye trackers to conduct studies on:
• Laptops
• PC monitors up to appr. 25 ″ (16:9)
• Mobile devices
• Real-world interfaces
• Projections, simulators
• TV screens
1.2 Applications Areas
The modular system can be used both in screen and real-world test scenarios, making way for a very broad spectrum of studies.
You can mount the eye tracker on a laptop, a PC monitor, an all-in-one PC, or even a tablet. Present your stimuli using a projec-
tion or TV. You can study real-world interfaces like a control panel, an ATM or a store shelf. The supplied mounting solutions
support a variety of study designs. Tobii Pro X3–120 Eye Tracker — is designed for studies aimed at determining precisely
where the participants are looking and for studying and measuring eye fixations and other eye tracking metrics based on these.
1.3 Basic Operating Principles
During tracking, Tobii Pro Eye Trackers use infrared diodes to generate reflection patterns on the corneas of the subject’s eyes.
These reflection patterns, together with other visual data about the subject, are collected by the image sensor. Sophisticated
image processing algorithms identify relevant features, including the eyes and the corneal reflection patterns. Complex mathe-
matics is used to calculate the 3D position of each eyeball, and finally the gaze point on the screen; in other words, where the
subject is looking.
Tobii Eye Trackers are designed for use in indoor office environments with adult participants.
Tobii Pro X3–120 Eye Tracker Product Description v.1.0.2 - en-US
1 Introduction
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