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Home » Products » Research & Scientific Instruments » Eye Tracking » Eye Tracker Tobii Pro Glasses 3

Shopper wearing Tobii Pro Glasses 3 reading a bottle label at a store shelf

Tobii Pro Glasses 3 — Eye tracker for research in the real world

Glasses that film what the participant sees and mark on that video where they are looking — in a store, behind the wheel, on the sports field or at a workstation. The participant moves freely, and you get scientific-quality data: gaze point, pupil and head movement.

Request a quote Technical specifications

0.6°accuracy, 1-point calibration

50 / 100Hzgaze sampling rate

106°scene camera field of view

76.5gglasses with cable

Wearable eye tracker

Glasses that see what the participant sees

An eye tracker is a device that measures where a person is looking. It usually sits below a monitor and tracks gaze on the screen. Glasses 3 are worn like glasses — so you study attention where it is actually used: in a store, in a car, in an operating room. Three elements do all the work.

Tobii Pro Glasses 3 from the front — scene camera above the nose, miniature eye tracking components visible in the lenses, cable on the right

Photo: Tobii. Description of operation according to the Tobii Pro Glasses 3 specification and the manufacturer's article “Why choose Tobii Pro Glasses 3 for eye tracking research”. What exactly the glasses record — see Recording data.

Software · Glasses 3 Controller

See gaze live, far from the lab

You run a field study from a tablet, an Android phone or a laptop. The Glasses 3 Controller app connects to the glasses through their own Wi-Fi network — you do not need the internet or the network of the store or plant. On the screen you see what the scene camera sees, and a circle where the participant is looking.

Tablet in a researcher's hand at a soldering station — the screen shows the image from the glasses scene camera and a red gaze point circle on the tip of the tool

Live View · glasses Wi-Fi

Glasses 3 Controller

participant data and calibration before recording
start, stop and playback of recordings
live gaze tracking
markers for important events during observation
video export in full or in segments

Windows 10 / 11macOS 13 / 14Android 13 / 14

Researcher at an airport following on a tablet the recording of a participant wearing Tobii Pro Glasses 3 — Observation at an airport

105 minof recording on one battery; with a power bank — no time limit

SD carddata stays on the card in the recording unit — outside the cloud, with no remote processing

own Wi-Filive view without an external network — even where there is none

312 grecording unit, 130 × 85 × 27 mm

Photos: Tobii. Features and operating systems according to the manufacturer's “Glasses 3 Controller App” page and the Tobii Pro Glasses 3 specification.

Software · Tobii Pro Lab

From recording to results: what you get from a study

The glasses produce a scene camera video showing the gaze point, and data recorded alongside it. Results — numbers and visualizations for the whole group — are created in Tobii Pro Lab. Below are five analysis steps, from the raw recording to a table ready for statistics.

1Replay and mark
2Map
3Auto-track
4Visualize
5Calculate

Two researchers reviewing a glasses recording on a tablet and taking notes

Step 1

Replay the recording and mark what interests you

You import the glasses recording into a Glasses-type project. You replay it with gaze overlaid and divide it into the segments you want to analyze — e.g. “at the sauce shelf” or “lane change”.

intervals and events — you mark the start and end of a segment on the timeline; they form times of interest (TOI)
fixation filter — for Glasses 3 recordings the manufacturer recommends Tobii I-VT (Attention), with a velocity threshold of 100°/s instead of the default 30°/s
video with gaze — you can export it in full or in segments directly from the Glasses 3 Controller app, e.g. for presenting results

Step 2 · Assisted Mapping

What mapping is — and why you do it

At a monitor, all participants see the same image, so their gaze can be overlaid right away. With glasses, everyone has their own video: a different angle, a different distance, constant head movement. To compare people, you need to transfer gaze from each video onto one common reference image (snapshot) — and that is mapping.

you take a photo of the shelf, cockpit or poster and add it to the project
you select a segment of the recording and run Assisted Mapping — the Real World Mapping algorithm finds the flat surface from the photo in successive frames and “stretches, shrinks or rotates” it to the camera view (homography)
a mapping confidence graph appears below the recording: segments above the threshold are green, those below are orange, to be checked
you move incorrectly placed points manually; the manufacturer recommends always reviewing the result — assisted mapping is not fully automatic

Scene camera videothe frame moves with the head

Store shelves with jars, trays and sauce bottles — a frame as seen by the glasses scene camera

25 fps

Reference imagea fixed location for each fixation

AOI: jars0

AOI: sauces0

Illustration on a Tobii photo: frame movement, fixations and mapping confidence are simulated. The numbers in the AOIs are the fixation counts in this animation.

Step 3 · New: AOI tracker (Pro Lab 26.18, September 2026)

Auto-track: the area of interest follows the object by itself

An area of interest (AOI) is the part of the image for which you want to calculate results — e.g. the navigation screen in a car. In a glasses video, the object keeps changing position in the frame. Until now, the AOI had to be moved manually, frame by frame. Now you draw it once and turn on Auto-track.

the AOI follows the object, and Pro Lab creates the successive keyframes of the dynamic AOI by itself
when the object leaves the frame or cannot be recognized, the AOI becomes inactive; after your correction a new keyframe is created and tracking continues
works on scene camera videos from Glasses 3 and Glasses X and on screen recordings
tracking is computed locally on your computer — no data is sent outside

When to use mapping and when Auto-track? Mapping, when you want to aggregate many participants on one image of a fixed location. Auto-track, when you analyze an object in the video — including one that moves or that you hold in your hand. It works best when the object is clearly visible, has distinct edges and contrast, and the image is well lit and not very blurred.

Car interior in a simulator: steering wheel, navigation screen and rear-view mirror — a frame as seen by the glasses scene camera

AOI: screen

AOI: mirror

Auto-track: tracking

Illustration on a Tobii photo: frame movement and tracking are simulated. Feature description: tobii.com (“What's new in Tobii Pro Lab”) and connect.tobii.com (“How to work with dynamic areas of interest”).

Step 4 · Visualizations

See what the group looked at

Once the gaze of all participants has been mapped onto the reference image, Pro Lab draws visualizations on it. Switch between the types next to this text to see how they differ.

Heat map: color shows where there were the most fixations or the longest looking — red the most, green the least. Four variants: fixation count or duration, in absolute or relative values. There is also a dynamic heat map on the video.
Gaze plot: successive fixations as circles: size is the fixation duration, the number — the order.
Bee swarm: where each participant is looking at a given moment — one dot per person, without averaging.
Opacity map: reveals the places that attracted the eye and darkens the rest of the image.

Visualizations can be compared between groups and saved as an image (PNG, JPEG) or video.

Reference image of a store shelf with a gaze visualization overlaid

Illustration on a Tobii photo — not a study result. Description of visualizations: connect.tobii.com (“Visualizations for Tobii Pro Lab”, “Calculate heat maps”).

Tobii Pro Lab, Metrics Visualizations view: fixation duration in three stimulus categories, with a list of metric groups on the left

Step 5 · Metrics and export

Numbers for statistics

For each AOI and each time of interest, Pro Lab calculates ready-made metrics — for individuals and for the whole group. You can view the distributions right in the software (in the screenshot next to this text) and export the data for further analysis.

Time to first fixationafter how many seconds the participant first looked at the AOI

Fixationsnumber and total duration of fixations in the AOI

Visits and glanceshow many times the eyes returned to the AOI and how long they stayed there

Blinks and saccadesincluding count and duration — for the whole segment or for the AOI

metrics export to tables for R or SPSS; raw data in TSV files
Pro Lab Output format (plof) — all project data, including AOIs and events, for other software
Glasses 3 motion sensor data (accelerometer, gyroscope, magnetometer) can also be exported

Glasses in Pro Lab: Analyzer edition (analysis of glasses recordings) or Full (all modules and project types)License: perpetual or subscriptionMore about Tobii Pro Lab

Tobii Pro Glasses 3 next to a tablet showing a cockpit view from the scene camera and a phone with the Glasses 3 app

Glasses 3 API — free, for your own applications

Full access to the glasses from code: recording control, calibration, live data and data from saved recordings. The scene camera image with gaze can be received live. The API works in any language that supports HTTP requests. For multimodal research, Tobii provides a Lab Streaming Layer (LSL) connector.

HTTP RESTWebSocketWebRTC · RTSP.NET SDKLSL

Sources: tobii.com (Tobii Pro Lab, “What's new in Tobii Pro Lab”, Glasses 3 API), connect.tobii.com (“Assisted mapping in Tobii Pro Lab”, “How to perform manual and assisted mapping”, “Understanding Tobii Pro Lab eye tracking metrics”, “Tobii Pro Lab data export formats”, “Tobii Pro Glasses 3 IMU data”). Photos and screenshot: Tobii.

Why Glasses 3 with Interlab

Glasses and software from one manufacturer

A popular alternative is a subscription-based multimodal platform to which you connect glasses from other manufacturers. Glasses 3 is a single-source approach: the glasses, the recording app and the analysis software come from Tobii — and we add physiological signals with a BIOPAC system.

Tobii Pro Glasses 3 from Interlab compared with a subscription platform and glasses from other manufacturers
Feature	Tobii Pro Glasses 3 from Interlab	Subscription platform + competing glasses
Glasses and software	one manufacturer: glasses, Glasses 3 Controller and Tobii Pro Lab	general-purpose platform; according to its manufacturer, eye tracking capabilities depend on the connected hardware
Data recording	SD card in the recording unit; data outside the cloud, with no remote processing	for some of the supported glasses, recording via a phone with an app and uploading recordings to the glasses manufacturer's cloud
Mapping and AOI on video	Assisted Mapping and automatic AOI tracking on video in Tobii Pro Lab	fully automatic AOI in dynamic scenes — a separately paid module
License	Pro Lab: perpetual or subscription; Glasses 3 API free of charge	mandatory core module + separately paid glasses module; annual renewal
Physiology	BIOPAC from Interlab: TTL markers and Lab Streaming Layer, wireless BioNomadix modules	additional paid platform modules

Competing glasses: models supported by the glasses module of a popular multimodal platform. Data from manufacturers' websites, as of October 2026.

What you get from Interlab

Test the glasses in your own field setting before you buy

Field research has its pitfalls: light, calibration on the move, choosing reference images. We help you anticipate them, set up the equipment and stay with your team after the purchase.

Book a Glasses 3 demo Request a quote

Worker in protective clothing wearing Tobii Pro Glasses 3 inspecting a device at a production workstation — Study at a workstation

Test before you buyA demo or trial loan — record a pilot in your own store, car or factory hall.
Multimodal labTobii and BIOPAC from a single supplier — configured and synchronized by us.
Methodological adviceWe help you plan the study: calibration procedure, reference images, AOIs and metrics.
Setup and trainingWe set up the glasses and the app and train your team in recording and mapping in Tobii Pro Lab.
Authorized Tobii partnerOfficial sales channel: manufacturer's warranty, updates and Tobii Pro Lab licenses.
Help with grantsTechnical descriptions, justifications and configurations for grant applications and tender specifications.
Local support in PolandTechnical and methodological support after the purchase — no intermediaries.
References in PolandInstallations at Polish universities and companies — contact with reference laboratories on request.

Multimodal research · Glasses 3 + BIOPAC

Gaze, body movement and physiology on one timeline

The glasses are often combined with other measurements: motion capture (body movement), EEG (brain activity) or ECG and EDA (bodily responses). For the data to be comparable, each event must be marked at the same moment in all recordings. This is what the synchronization port in the recording unit and Lab Streaming Layer streams are for.

Basketball player wearing Tobii Pro Glasses 3 with a Qualisys motion capture marker attachment and markers on the body, holding a ball

In the Glasses 3

Synchronization port: 3.5 mm jack socket (TTL signal) in the recording unit — accepts event markers from other devices.
Head movement: gyroscope and accelerometer (100 Hz) and magnetometer (10 Hz) in the frame.
Motion capture: attachment with passive markers for Qualisys and Vicon systems.
EEG: compatibility with systems from e.g. Brain Products and Bitbrain; combining EEG and biometric data in Tobii Pro Lab.
Lab Streaming Layer: the LSL connector from Tobii makes the glasses streams available to other software.

In the lab with BIOPAC

The participant wearing the glasses moves around — that is why we offer wireless physiology.

BioNomadix: wireless physiological signal modules, including ECG, EDA and EMG.
MP200: 16 TTL digital lines — event markers to the glasses synchronization port.
AcqKnowledge 6 with an LSL license: receiving Lab Streaming Layer streams — including from the glasses LSL connector.
Configuration: we select signals, synchronization and software together with you — before the purchase.

Signal tracks on the photo are illustrative. Sources: tobii.com (specification, motion capture accessories, scientific use cases), connect.tobii.com (“Can Tobii Pro Glasses accept TTL signals”), biopac.com (AcqKnowledge, MP200). Photo: Tobii.

Applications

Where Glasses 3 are used

Wherever behavior cannot be moved in front of a monitor — because real space, movement and tools in hand matter.

Driver wearing Tobii Pro Glasses 3 in a driving simulator with a road screen and dashboard

Drivers and vehicle interfaces

Distraction, fatigue, cognitive load and cockpit operation — in a simulator or on the road.

Table tennis player wearing Tobii Pro Glasses 3 during a game

Sports

Athletes' visual strategies without restricting movement, also with motion capture.

Surgical team during an operation at the Deutsches Herzzentrum Berlin

Medicine

Surgical technique from the surgeon's perspective — for training and assessing students' progress.

Two pilots in the cockpit of a passenger aircraft

Aviation and human factors

Crew work in the cockpit and in the simulator — where safety depends on attention.

Technician in a clean area wearing Tobii Pro Glasses 3 assembling a component with insulation foil

Industry

Quality control, assembly, transfer of experienced workers' knowledge.

Shopper wearing Tobii Pro Glasses 3 holding a bottle of sauce and looking at the top store shelf

Consumer research

What catches the eye on the shelf and why — packaging, displays, signage.

Woman wearing Tobii Pro Glasses 3 using a smartphone

Education and UX

Attention in a real classroom; use of phones, apps and devices in natural conditions.

Man wearing Tobii Pro Glasses 3 and an EEG headband looking at an exhibit in an exhibition space

Psychology and neuroscience

Natural behavior, social interaction, navigation and learning — also with EEG.

Cyclist wearing a helmet and Tobii Pro Glasses 3 on a city street

Urban mobility

How pedestrians, cyclists and drivers read the street, signs and the traffic around them.

Photos: Tobii. Applications according to the manufacturer's pages (“Scientific use cases”, product page).

Study participant

They fit the participant, not the other way around

The glasses weigh 76.5 g including the cable. Calibration is a single point or an automatic procedure, and when the glasses slip on the nose, the 3D tracking mode compensates for the slippage. Accessories are available for people who wear glasses every day and for work in demanding conditions.

Tobii Pro Glasses 3 with a −2.5 corrective lens snapped on

Corrective lenses

Snap onto the lenses, from −8.0 to +3.0 diopters in 0.5 steps — 44 lenses in the kit, 22 for each eye.

Protective lenses

Made of durable polycarbonate, resistant to impact and scratches. Clear or tinted, blocking infrared.

Motorcyclist in a helmet wearing Tobii Pro Glasses 3 under the raised visor

Under a helmet and on the move

The slim frame fits under a helmet; the cable runs to the recording unit worn on the body.

1 pointmanual calibration — or automatic

3Dtracking mode compensating for glasses slippage

autoparallax compensation between the eye and the scene camera

mmabsolute pupil diameter measurement

Photos: Tobii. Sources: Tobii Pro Glasses 3 specification, accessory pages “Tobii corrective lenses” and “Tobii protective lenses”.

Recording data

What exactly the glasses record

In addition to video and gaze, the glasses record pupil diameter, head movement and audio. This data goes to Tobii Pro Lab and can be exported — including motion sensor readings.

One recording, many streams

All streams on a common timeline

In addition to video and gaze, the glasses record head movement and audio. All streams share a common clock, so you know where the participant was looking, what they heard and how they moved their head at the same moment.

recording time · playback 4× slower

How to read it: each bar is one data stream. New data appears on the right and moves to the left — you see the last 4 seconds.
Gaze: a flat section of the line is a fixation — the eye stopped on one point. A vertical jump is a saccade — a rapid shift of the eyes to another place.
Common clock: the dashed yellow line is an event, e.g. the appearance of a stimulus. It crosses all bars at the same moment — this is how data from different streams is aligned in analysis.

Illustrative waveforms generated in the browser — not a recording from the device. Sampling rates according to the manufacturer's specification.

Specifications

Technical specifications

According to the manufacturer's current specification. Tobii measures accuracy, precision and data loss in different areas of the field of view, on binocular data.

Tobii Pro Glasses 3 with the cable to the recording unit

Tobii Pro Glasses 3 technical specifications
Parameter	Value
Eye tracking
Method	corneal reflection, dark pupil, stereo geometry; binocular tracking
Sampling rate	50 Hz or 100 Hz
Accuracy	0.6°average, one-point calibration
Precision	0.03° (average)
Data loss	0.01% (average)
Calibration	one-point or automatic
Compensation	slippage — 3D tracking mode; parallax — automatic
Pupil measurement	yes, absolute value
Eye sensors	4 (2 per eye)
Glasses (head unit)
Scene camera	1920 × 1080 px, 25 fps, H.264field of view: 106° diagonal (16:9), 95° horizontal, 63° vertical
Motion sensors	gyroscope and accelerometer (100 Hz), magnetometer (10 Hz) — ST LSM9DS1
Audio	built-in microphone, mono, 16 bit
Weight and dimensions	76.5 g with cable; frame 153 × 168 × 51 mm
Cable	1200 mm
Materials	Grilamid, stainless steel, optical-grade plastic lenses; replaceable nose pads
Recording unit
Recording time	105 min on batterywhen powered from a power bank — no time limit
Battery	Li-ion 18650, 3400 mAh, rechargeable
Storage	SD card (SDHC, SDXC)
Synchronization port	3.5 mm jack, TTL signal
Connectors	Micro USB, RJ45 (Ethernet), 3.5 mm jack (synchronization), glasses connector
Weight and dimensions	312 g; 130 × 85 × 27 mm
Software and accessories
Recording	Glasses 3 Controller — Windows 10/11, macOS 13/14, Android 13/14
Analysis	Tobii Pro Lab — Analyzer or Full edition
Programming	Glasses 3 API (free): HTTP REST, WebSocket, live video via WebRTC and RTSP
Accessories	corrective lenses −8.0…+3.0 D; protective lenses; motion capture marker attachment (Qualisys, Vicon)

Glasses 3 compared with Tobii Glasses X

Comparison according to the manufacturer. Glasses X are for training and analysis in companies; Glasses 3 — for scientific research where accuracy, raw data and synchronization matter.

Comparison of Tobii Pro Glasses 3 and Tobii Glasses X
Parameter	Tobii Pro Glasses 3	Tobii Glasses X
Intended use	neuroscience, precise UX research, medical and clinical research, multimodal research	attention training, efficiency and quality in production, process analysis, consumer research
Accuracy	0.6° (one-point calibration)	2.5° (no calibration)
Eye cameras	two per eye	one per eye
Sampling rate	50–100 Hz	120 Hz
TTL synchronization port	yes	no
Corrective lenses	−8 to +3 D	−6 to +3 D
Data	raw data export, custom metrics	depending on the package: visualizations without raw data, or export from Pro Lab

Sources: tobii.com — Tobii Pro Glasses 3 product page, Tobii glasses comparison, article “Why choose Tobii Pro Glasses 3” (as of October 2026).

Frequently asked questions

Can a person who wears prescription glasses take part in a study?

Yes. Instead of their own glasses, the participant gets corrective lenses that snap onto the Glasses 3 lenses — from −8.0 to +3.0 diopters in 0.5 D steps. The kit contains 44 lenses, 22 for each eye.

How long can you record?

105 minutes on one battery. When the recording unit is powered from a power bank, the manufacturer does not limit recording time. Data is saved to an SD card.

Is an internet connection or the cloud needed?

No. The glasses create their own Wi-Fi network, through which the Glasses 3 Controller app shows the live view. Recordings stay on the SD card in the recording unit — the manufacturer emphasizes that they do not go to the cloud and are not processed remotely.

What software and licenses are needed?

You run the recording in the Glasses 3 Controller app (Windows, macOS, Android). For analysis — mapping, AOIs, heat maps and metrics — you need Tobii Pro Lab in the Analyzer or Full edition, with a perpetual or subscription license. The Glasses 3 API for your own applications is free of charge.

How do you compare many participants when each sees the scene differently?

With the Assisted Mapping feature in Tobii Pro Lab. You take a reference photo of the location or object, and the software automatically transfers gaze from all participants' recordings onto it. You then calculate AOIs, heat maps and metrics on this single image.

How does mapping differ from Auto-track?

Mapping (Assisted Mapping) transfers gaze from all participants' videos onto one reference image of a fixed location — a shelf, a cockpit, a poster. You then calculate visualizations and metrics for the whole group on one image. Auto-track (from Pro Lab 26.18) works on the video itself: you draw an area of interest around an object, and it follows the object from frame to frame — useful when the object moves or there is no single fixed view.

How do you synchronize the glasses with EEG, motion capture or physiology?

In hardware — through the synchronization port (3.5 mm jack, TTL signal) in the recording unit. In software — through the Glasses 3 API or the Lab Streaming Layer connector from Tobii. For motion capture there is a marker attachment for Qualisys and Vicon systems. We select physiology from the BIOPAC system — ask us about the configuration.

Glasses or a screen-based eye tracker?

If the stimuli are on a screen and a high sampling rate and controlled conditions matter, a screen-based eye tracker is better — e.g. Tobii Pro Spectrum (up to 1200 Hz), Pro Fusion or Pro Spark. You choose glasses when the study takes place in real space and the participant needs to walk, drive or work with their hands.

Can the glasses be borrowed for a pilot study?

Yes — we arrange a demo or a trial loan so you can test the glasses in the conditions of your study. Write to us.

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