Tobii Pro Nano User manual

Pro Nano
User Manual

Pro Nano User Manual
Version 2.0
11/2020
All rights reserved.
Copyright © Tobii Pro AB (publ)
The information contained in this document is proprietary to
Tobii Pro AB. Any reproduction in part or whole without prior written
authorization by Tobii Pro AB is prohibited.
Products that are referred to in this document may be either trade-
marks and/or registered trademarks of the respective owners. The
publisher and the author make no claim to these trademarks.
While every precaution has been taken in the preparation of this
document, the publisher and the author assume no responsibility for
errors or omissions, or for damages resulting from the use of
information contained in this document or from the use of programs
and source code that may accompany it. In no event shall the
publisher and the author be liable for any loss of profit or any other
commercial damage caused or alleged to have been caused directly
or indirectly by this document.
Content subject to change without notice.
Please visit Tobii Pro Connect for updated versions of this doc-
ument.

Pro Nano User Manual v2.0 3
Table of Contents
1 Introduction 5
1.1 Intended use 5
1.2 Symbols used in this document 6
1.3 What’s in the box 6
1.4 How Pro Nano works 6
1.5 Tobii Pro Eye Tracker Manager 6
2 Safety 8
2.1 Mounting warning 8
2.2 Emergency warning 8
2.3 Epilepsy warning 8
2.4 Infrared warning 8
2.5 Magnetic field warning 9
2.6 Child safety 9
2.7 Electricity 9
2.8 Accessories 9
2.9 Third party 9
3 Software and System Requirements 10
3.1 System requirements 10
3.2 Pro Nano compatibility — Windows 10
3.3 Pro Nano compatibility — macOS 10
4 Additional Tobii Pro products & accessories 11
4.1 Additional software options 11
4.2 Compatible accessories 11
5 Set Up Your Tobii Pro Eye Tracker 12
5.1 Download and install Tobii Pro Eye Tracker Manager 12
5.2 Install the eye tracker in Tobii Pro Eye Tracker Manager 12
5.3 Mount the eye tracker on a laptop or monitor 13
5.4 Display setup in Tobii Pro Eye Tracker Manager 14
5.5 Calibration 14
5.5.1 What calibration does 15
5.5.2 Additional information for experienced users 15
5.6 Detach the eye tracker 15
6 Display Setups 17
6.1 Standard setup 17
6.2 Tips for setting up the eye tracker display 17
6.3 Set up with a tripod 17
7 Start Experimenting 19
7.1 Start eye tracking 19
7.2 Tobii Pro Lab 19
7.3 Keep your eye tracker software and display setup updated 19
8 Product Care 21
8.1 Transportation and storage 21
8.2 Cleaning 21
8.3 Disposal of the eye tracker 21

Pro Nano User Manual v2.0 4
8.4 Limitation of liability 21
9 Technical Specifications 22
9.1 Eye tracking specifications 22
9.2 Setup 22
9.3 Software compatibility 23
9.4 Hardware versions 23
9.5 Pro Nano Eye Tracker specifications 23
Appendix A Compliance 24
Appendix B Support, Learning Center, and Warranty 26
B1 CustomerSupport 26
B1.1 Get help online 26
B2 Learning Center 26
B3 Warranty information 26
Appendix C Limitations and considerations 27
C1 Intended use 27
C2 Light conditions 27
C3 Eyelashes 27
C4 Droopy eyelids 27
Appendix D Glossary 28

Pro Nano User Manual v2.0 5
1 Introduction
Tobii Pro Nano welcomes you to the world of eye-tracking studies. Pro Nano is a small and port-
able eye tracker that you can use for studies on laptops, monitors up to 19ʺ (16:9), mobile devices
(using the mobile device stand), real-world interfaces, projections, simulators, and TV screens. It
is designed for portability, versatility and ease of use.
Tobii Pro Nano is our smallest, most light-weight research grade eye tracker, featuring the latest
technology advancements from Tobii Pro. The Pro Nano device measures 170 mm (6.69’’) long
and weights 59 grams (2.1 oz.), and uses a sampling rate of 60 Hz. The design also serves as an
introduction to extensive studies into human behavior for educational and research purposes.
Use Pro Nano on:
lWindows and Mac computers with an optimal screen size of 19″ or less (16:9)
lMobile devices, with our Mobile Device Stand
lReal-world setups like physical objects and social interactions, with the Tripod Stand
lProjections, simulators, and larger screens, with the Tripod Stand
1.1 Intended use
Pro Nano is primarily intended for fixation-based eye tracking studies on Windows and Mac
laptops and Windows tablets. The Pro Nano system has been tested and proven capable of track-
ing a large proportion of the population, regardless of gender and ethnicity, with very high accur-
acy and precision on portable screens. Its discrete appearance, with fully embedded processing
of eye-tracking data, enables flexible and unobtrusive data collection methods. The eye tracker’s
mounting plates enable easy attachment to various screens and the device is connected via a
USB 2.0 port to your Windows or Mac computer.
Pro Nano is perfect for any researcher who wants to get started with or explore quality eye track-
ing as a research method for fixation-based eye tracking studies in:
lPsychology and cognition
lPackage design in marketing research
lUser interface design and development
Pro Nano is our smallest research-graded eye tracker designed for portable labs doing data col-
lection in the field:
lMake your own portable research lab that fits in a backpack
lCollect data wherever your participants are, for instance at universities, hospitals, and public
spaces
Pro Nano is well-suited for equipping universities with portable eye tracking solutions that enable stu-
dents to test eye tracking and build knowledge how the technology can be used in different fields,
answer research questions and enhance commercial endeavors.

Pro Nano User Manual v2.0 6
1.2 Symbols used in this document
Three different symbols are used in this document:
The Information symbol means something is important or needs special attention.
xxxxxxxxx
The Tip symbol denotes additional information that can make a process or function
easier.
The Warning symbol means there is a possible risk of harm if the warning is ignored.
1.3 What’s in the box
lPro Nano Eye Tracker
lUSB 2 extension cable (1 m)
lTravel case
lSafety and Compliance and Installation Guide
l2 cleaning wipes for cleaning the screen bezel before affixing the mounting plate
l4 mounting plates with non-permanent adhesive for attaching the eye tracker to a screen
bezel
1.4 How Pro Nano works
During eye tracking, Pro Nano uses infrared illuminators to generate reflection patterns on the
corneas of the participant’s eyes. These reflection patterns, together with other visual data about
the participant, are collected by image sensors. Sophisticated image processing algorithms
identify relevant features, including the eyes and the corneal reflection patterns. The Pro Nano is
a single camera system that uses a combination of dark and bright pupil tracking. Complex math-
ematics is used to calculate the 3D position of each eyeball, and finally the gaze point; in other
words, where the participant is looking.
1.5 Tobii Pro Eye Tracker Manager
Tobii Pro Eye Tracker Manager is free software available on Tobii Pro Connect.
Pro Eye Tracker Manager helps you manage your Tobii Pro eye tracker. It lets you see which eye
tracker firmware and software versions you are running and also facilitates updates (where applic-
able). It provides:
lDrivers and Firmware installation or updates
lDisplay setup
lPositioning guide

Pro Nano User Manual v2.0 7
lUser calibration
lGaze visualization*
*Gaze visualization in Pro Eye Tracker Manager lets you quickly evaluate the quality of the eye track-
ing data. The Gaze visualization overlaps data only on the Pro Eye Tracker Manager screen while
Pro Eye Tracker Manager is open.
References in product documentation to Tobii Pro Eye Tracker Manager refer to the
latest version available on Tobii Pro’s website.

Pro Nano User Manual v2.0 8
2 Safety
2.1 Mounting warning
Tobii Pro eye trackers should be mounted according to Tobii Pro´s instructions for
approved mounts.
The mounting bracket is designed for adhesion to a wide variety of surfaces, such as mon-
itors or laptop screens. It is also designed for clean removability. Failure to follow the
recommended removal instructions can result in damage to both the monitor/laptop and
the mounting bracket. Do not mount the eye tracker on monitors positioned above the
head or face of a user, as it might fall.
2.2 Emergency warning
Tobii Pro eye trackers are designed to be used only for research purposes. Be aware
that due to the low, but possible risk of failure or distraction, the eye tracker should not be
relied upon or used in dangerous or critical situations.
2.3 Epilepsy warning
Some people with photosensitive epilepsy are susceptible to epileptic seizures or loss of
consciousness when exposed to certain flashing lights or light patterns in everyday life.
This may happen even if the person has no medical history of epilepsy or has never had
any epileptic seizures.
A person with photosensitive epilepsy would also be likely to have problems with TV
screens, some arcade games, and flickering fluorescent bulbs. Such people may have a
seizure while watching certain images or patterns on a monitor, or even when exposed to
the light sources of an eye tracker. It is estimated that about 3-5% of people with epilepsy
have this type of photosensitive epilepsy. Many people with photosensitive epilepsy
experience an “aura” or feel odd sensations before the seizure occurs. If you feel odd dur-
ing use, move your eyes away from the eye tracker.
2.4 Infrared warning
When activated, the Tobii Pro eye tracker emits pulsed infrared (IR) light. Certain med-
ical devices are susceptible to disturbance by IR light and/or radiation. Do not use the eye
tracker in the vicinity of these kinds of susceptible medical devices, as their accuracy or
proper functionality could be inhibited. Do not stare into the LED lights at a close distance
(<15cm).

Pro Nano User Manual v2.0 9
2.5 Magnetic field warning
This Tobii Pro eye tracker contains magnets. Magnetic fields may interfere with the func-
tion of cardiac pacemakers and implantable cardioverter defibrillators. As a general rule,
maintain a minimum distance of 6 inches (15 centimeters) between any item with mag-
nets and your heart device.
2.6 Child safety
A Tobii Pro eye tracker is an advanced computer system and electronic device. As such,
it is composed of numerous separate, assembled parts. In the hands of a child, some of
these parts have the possibility of being separated from the device, possibly resulting in a
choking hazard or other danger to the child.
Young children should not have access to, nor use of the device or its accessories
without parental or guardian supervision.
2.7 Electricity
Do not open the casing of the Tobii Pro eye tracker, this could expose you to potentially
hazardous electrical voltage. The device contains no user-serviceable parts. Non-
compliance will result in loss of warranty! Contact Tobii Pro Support if your eye tracker is
not working properly.
2.8 Accessories
Only use accessories provided by or approved by Tobii Pro AB.
2.9 Third party
Any use of a Tobii Pro eye tracker outside the intended use and together with any third-
party software or hardware that changes the intended use is a risk, and Tobii Pro AB can
not take any responsibility in these situations.

Pro Nano User Manual v2.0 10
3 Software and System Requirements
Pro Nano is connected to a computer via a standard USB 2.0 interface. All eye tracking pro-
cessing is done in the internal Eye Chip.
3.1 System requirements
Operating system Windows 10 Professional or Enterprise editions
macOS High Sierra and Mojave
CPU 1 GHz, 2 cores
RAM 2 GB RAM memory
Note: Software for eye-tracking research might require
higher RAM
Connectors USB 2.0 Type A
3.2 Pro Nano compatibility — Windows
Platform support Windows 10, Professional or Enterprise editions
Tobii Pro Software support Tobii Pro Lab version 1.101 or newer
Tobii Pro Eye Tracker Manager version 2.0 or newer
SDK support Tobii Pro SDK version 1.7 or newer
3.3 Pro Nano compatibility — macOS
Platform support macOS 10.13 High Sierra; macOS 10.14 Mojave
Tobii Pro Software support Tobii Pro Eye Tracker Manager version 2.0 or newer
SDK support Tobii Pro SDK version 1.7 or newer

Pro Nano User Manual v2.0 11
4 Additional Tobii Pro products & accessor-
ies
4.1 Additional software options
Pro Lab
tobiipro.com/product-listing/tobii-pro-lab/
Pro Lab is a comprehensive research software platform
for eye tracking designed to meet the highest demands
on different research scenarios with exact timing accur-
acy. This software offers an efficient workflow, making
it easy to design experiments, record data, analyze and
visualize eye tracking data, and to sync this data with
other biometric data streams.
Pro SDK
tobiipro.com/product-listing/tobii-pro-sdk/
Pro SDK offers a broad set of tools that makes it simple
to develop a variety of niche applications or scripts
across multiple platforms, using a wide range of pro-
gramming languages. This SDK gives the researcher
access to the full set of relevant gaze data streams,
such as 3D eye coordinates, raw data, pupil data, etc.
Third-party software This term refers to any application built on Pro SDK.
4.2 Compatible accessories
lMobile Device Stand
lAdditional Mounting Brackets
lTobii Pro Tripod Stand
Learn more about Tobii Pro Nano accessories available for purchase on tobiipro.com.

Pro Nano User Manual v2.0 12
5 Set Up Your Tobii Pro Eye Tracker
At the end of this setup, you will have a verified installation that is ready for use. Begin setting up
your Pro Nano by unpacking the eye tracker.
Read more about setting up and installing your eye tracker in the Tobii Pro Learning Center.
5.1 Download and install Tobii Pro Eye Tracker Manager
The first step is to get the free application, Tobii Pro Eye Tracker Manager on your computer. Set-
ting up your eye tracker involves installing the necessary drivers and software on your computer
and Pro Eye Tracker Manager makes this much easier. Read more in Tobii Pro Eye Tracker Man-
ager.
Your eye tracker does not need to be connected to the computer to install Eye Tracker
Manager.
1. Before starting, double-check the Pro Nano's System requirements.
2. Download Pro Eye Tracker Manager from tobiipro.com .
3. Install Pro Eye Tracker Manager.
4. Proceed to the next step.
For more information about setting up Pro Nano and using Pro Eye Tracker Manager, visit theTobii
Pro Learning Center.
This document assumes the use of Tobii Pro Eye Tracker Manager 2.0 or later.
5.2 Install the eye tracker in Tobii Pro Eye Tracker Manager
Now we need to make sure your computer can talk to your eye tracker. This is necessary for down-
loading the applicable drivers and updates.
1. Open Pro Eye Tracker Manager if it is not already running.
2. Connect the Pro Nano’s USB cable to a USB port on your computer. Don’t mount (affix to the
computer) the eye tracker just yet, merely plug in the USB and lay the eye tracker beside the
computer until you know everything’s working.
3. If your Pro Nano is connected to the USB port but doesn’t appear in the list of connected eye
trackers, click the plus (+) symbol in the upper right corner to install (or re-install in some
cases) the required drivers. Sometimes restarting Pro Eye Tracker Manager is necessary.
4. Select Tobii Pro Nano and click the Install button.
5. Follow the prompts in Pro Eye Tracker Manager to finish installation.
6. Proceed to the next step.

Pro Nano User Manual v2.0 13
5.3 Mount the eye tracker on a laptop or monitor
To ensure quality in eye tracking data, your eye tracker hardware package includes several mount-
ing plates that can be affixed to a laptop or monitor. You can easily snap the eye tracker on and off
the screen bezel using the magnetic mounting plate. The mounting plate sticks to the frame with a
special adhesive that doesn’t damage the underlying surface when the mounting plate is
removed. For more information, read Detach the eye tracker.
What to do:
1. Check that your eye tracker is detected and displayed as a “card” in Pro Eye Tracker Man-
ager. Expand your eye tracker’s “card” in Pro Eye Tracker Manager to see that the serial num-
ber of your eye tracker matches the number displayed.
2. You can leave your eye tracker USB connected and beside your computer or you can dis-
connect it while attaching the mounting hardware.
3. Important! If you plan to attach the eye tracker to a laptop, make sure the laptop can close
with the magnetic mounting plate attached. Some laptops have very little space when closed
and this could damage the screen.
4. Find the center of the screen and clean the bezel.
5. Peel the adhesive tape off the mounting plate and mount it on the bezel. Press the bracket
against the bezel for 30 seconds and leave it there for one hour before attaching the eye
tracker.
6. Attach the eye tracker and make sure that it aligns properly with the mounting plate. The mag-
net holds the eye tracker firmly in place when the slots are lined up properly.

Pro Nano User Manual v2.0 14
7. If Pro Nano is not connected, plug in the USB cable to the correct USB port in your computer.
8. Proceed to the next step.
5.4 Display setup in Tobii Pro Eye Tracker Manager
Now your computer needs to understand where the eye tracker is in relation to the screen.
1. Open Pro Eye Tracker Manager if it’s not already opened and select your eye tracker.
2. On the Overview tab, locate Display Setup and click the ellipsis button to the right. On the
drop-down menu, click New.
3. Select the display setup you’re using and click the Next button.
4. Follow the instructions in each configuration step.
5. To confirm that the eye tracker can detect your eyes, enable the Position Guide at the bottom
left of Pro Eye Tracker Manager. Once activated, you should be able to see two circles in a
face contour.
6. In the next step, you will test your setup by performing a calibration. See Calibration.
You can always return to Pro Eye Tracker Manager and use it when you change com-
puters or screens or when you wish to redo a setup.
5.5 Calibration
When you are done configuring your eye tracker, you should run a calibration to test if the eye
tracker is mapping the gaze points correctly to your display.
To test your eye tracking setup:

Pro Nano User Manual v2.0 15
1. Make sure the eye tracker is attached to the monitor and connected to your computer. Open
Pro Eye Tracker Manager. For more information, read Tobii Pro Eye Tracker Manager .
2. By now, you should have also tested your setup as described in Display setup in Tobii Pro
Eye Tracker Manager.
3. Click the Calibrate button in Pro Eye Tracker Manager and follow the on-screen instructions.
4. Evaluate your calibration results. Large systematic errors i.e. a large distance between the
average gaze point and the target gaze point may be indicative of a configuration error. No
calibration feedback data on the targets located on the top of the screen may indicate that
there is a mismatch between the screen size and eye tracker configuration. Click the Recal-
ibrate button to improve a calibration. Click the Use Calibration button when you are satisfied
with the your calibration.
5.5.1 What calibration does
The human eye shows a natural individual variation in its shape and geometry. For example, the
exact location of the fovea, the area responsible for the part of the visual field that we perceive in
focus and full color, varies from individual to individual. Tobii Pro Eye Trackers use an individual
calibration procedure to optimize their gaze estimation algorithms (i.e. the 3D eye model) and
account for this variation. The end result of this optimization is a fully-customized and more accur-
ate gaze point calculation.
You can do basic calibration in Pro Eye Tracker Manager. There is more functionality, including
calibration validation, in Tobii Pro Lab.
You can find more information in the Tobii Pro Learning Center about calibration and performing a
calibration and validation in Pro Lab.
5.5.2 Additional information for experienced users
A participant can be calibrated with Pro Nano even when only one eye was successfully
calibrated. That calibration gets copied to the “failed” eye as well, and this might cause
poor data for that eye.
Pro Nano produces only one vector for the calibration results, thereby providing inform-
ation on the average estimated accuracy, but not on the estimated precision.
Use the Left and Right eyes results in Pro Eye Tracker Manager and Pro Lab to determ-
ine whether both eyes were calibrated successfully. You can also choose to analyze the
data only for the eye that successfully calibrated.
5.6 Detach the eye tracker
To temporarily remove the eye tracker, pull it away from the magnetic mounting plate and
leave the magnetic plate in place.
To permanently remove the magnetic mounting plate, you must remove the non-permanent but
strong adhesive that fastens your eye tracker mounting plate to the screen bezel. Since it is fairly
strong, you may not be able to take it away with only your fingers. If you want to remove it, we
recommend using something very thin such as dental floss or a thin thread, a guitar pick, or a
credit card. Use this to slide between the mounting plate and the computer bezel (or whatever it

Pro Nano User Manual v2.0 16
is attached to). As you slide it behind the mounting plate, gently bend the mounting plate back-
wards so that it detaches.

Pro Nano User Manual v2.0 17
6 Display Setups
6.1 Standard setup
The standard setup for using the Tobii Pro Nano is with a screen of maximum size 19". The eye
tracker is attached below the screen whether it is a laptop screen or separate monitor.
6.2 Tips for setting up the eye tracker display
If the screen bezel is thinner than the width of the eye tracker, affix the mounting plate as low as
possible on the screen frame, or directly on the screen.
lDon’t use this setup if you intend to put stimuli in the lower part of the screen, as the eye
tracker might cover them.
lWe recommend that you remove the mounting plate before closing the lid of the laptop.
lUse Pro Eye Tracker Manager’s “Display Setup — Advanced” to select a negative value for
the height distance between the top of the eye tracker and the bottom of the display screen.
Alternatively, use the tripod accessory and mount the eye tracker away from the screen.
6.3 Set up with a tripod
If you want to use a wider screen, the hardware is set up in a slightly different manner:
1. Select a suitable location and set up the screen.
2. Set up the projector and connect it to the laptop.

Pro Nano User Manual v2.0 18
3. Mount the eye tracker on a separate tripod and connect it to the laptop.
4. Use Pro Eye Tracker Manager’s Advanced Setup to ensure that the eye tracker can detect
the participant’s eyes. Select New in the drop-down Display Setup menu and follow the
steps.
5. Give your screen configuration a name so that you can reuse the settings later. Type it in the
Display Setup Name text box, then click the Save button. Your configuration is now available
and selected in the Display setup drop-down menu.
6. Test the screen configuration by performing a calibration. If you are tracking a physical plane
instead of a screen, the calibration must be done in Pro Lab.
For more detailed instructions, read the Tobii Pro Learn article Using Pro Eye Tracker Manager to
configure the eye tracker.
You must measure and specify all the parameters as accurately as possible to maintain
good eye tracking data quality.

Pro Nano User Manual v2.0 19
7 Start Experimenting
Now that your eye tracker is up and running, you can move to the eye tracking software you will
use. Tobii Pro recommends Tobii Pro Lab and Additional software options.
You can always return to Tobii Pro Eye Tracker Manager and use it when you change
computers or screens or want to redo a setup.
7.1 Start eye tracking
To see where the participant’s focus is, open Pro Eye Tracker Manager and activate Gaze Tra-
cing by toggling the Gaze Visualization switch on the Overview tab. A hazy blob appears on the
screen, indicating where attention is focused. Use this functionality to verify that your eye tracker
is running, that the display is correctly set up, and that your eye tracker is calibrated.
7.2 Tobii Pro Lab
Tobii Pro Lab provides a comprehensive platform for the recording and analysis of eye gaze data,
which helps in the interpretation of human behavior, consumer responses, and psychology. Com-
bining simple preparation for testing procedures and advanced tools for Visualization and ana-
lysis, eye-tracking data is easily processed for useful comparison, interpretation, and
presentation. A broad range of studies are supported, from usability testing and market research,
to psychology and oculomotor physiological experiments. Pro Lab’s intuitive workflow, along with
its advanced analysis tools, enables large and small studies in a timely and cost-efficient way
without the need for extensive training.
In addition to offering powerful analysis tools, Pro Lab is also designed to work with other soft-
ware commonly used for recording and analyzing data. This is done by synchronizing with
recording software using TTL, as well as by enabling data exports in standardized formats, for
example for Microsoft Excel, Matlab, and SPSS.
7.3 Keep your eye tracker software and display setup updated
Updates
From time to time, Tobii Pro releases updates for an eye tracker’s applicable driver and firmware
in order to improve performance and/or introduce new functionalities. Please check the Tobii Pro
website regularly for news and information about updates about your eye tracker. We recom-
mend that you activate updates and notifications in Pro Eye Tracker Manager.
How to activate notifications and updates in Pro Eye Tracker Manager:
1. Click to expand the drop-down list at the top of Pro Eye Tracker Manager.
2. Toggle the switches for notifications. Orange means they are activated.
3. If a software update is available, the available update has a clickable orange link.
4. Select an interface language. The default is English.

Pro Nano User Manual v2.0 20
Display setup updates
Use Pro Eye Tracker Manager whenever you change computers or display setups.
All references to Pro Eye Tracker Manager assume that you are using the latest version
of this free software.