Tobii Pro Spark User manual

Tobii Pro Spark
User Manual
November 2022

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Tobii Pro Spark User Manual
v. 1.0
November 2022
All rights reserved.
Copyright © Tobii AB (publ)
The information contained in this document is
proprietary to Tobii AB. Any reproduction in part or
whole without prior written authorization by Tobii AB is
prohibited.
Products that are referred to in this document may be
either trademarks 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 Connect for updated versions of this
document.

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Table of Contents
Tobii Pro Spark User Manual ...............................................................................................1
1Introduction.......................................................................................................................4
1.1 Symbols used in this document ...............................................................................4
1.2 Tobii Pro Eye Tracker Manager......................................................................................4
2System requirements........................................................................................................6
2.1 Tobii Pro Spark system requirements...........................................................................6
2.2 Additional software options...........................................................................................6
3Safety Declaration .............................................................................................................7
3.1 Mounting Warning..........................................................................................................7
3.2 Emergency Warning .......................................................................................................7
3.3 Epilepsy Warning ............................................................................................................7
3.4 Infrared Warning.............................................................................................................7
3.5 Magnetic Field Warning..................................................................................................8
3.6 Child Safety......................................................................................................................8
3.7 Electricity .........................................................................................................................8
3.8 Environment....................................................................................................................8
3.9 Electricity .........................................................................................................................8
3.10 Third party.....................................................................................................................8
4Compliance Declaration ...................................................................................................9
4.1 EU Compliance................................................................................................................9
4.2 UKCA Compliance ...........................................................................................................9
4.3 FCC Interference Statement.........................................................................................10
4.4 ISED Statement .............................................................................................................10
4.5 Australia and New Zealand Compliance.....................................................................10
4.6 Japan Compliance .........................................................................................................11
4.7 Korea Compliance.........................................................................................................11
4.8 Safety Compliance ........................................................................................................11
4.9 EMC Compliance...........................................................................................................12
4.10 RoHS Compliance .......................................................................................................12
4.11 Waste Disposal and Recycling ...................................................................................12
5Overview of Tobii Pro Spark...........................................................................................13
5.1 Tobii Pro Spark versions...............................................................................................13
5.2 How Tobii Pro Spark works..........................................................................................13
5.3 What is in the Pro Spark box........................................................................................14
5.4 How to use the USB Type-C male to Type-A female adapter....................................15
5.5 Tobii accessories...........................................................................................................15
6Set up your Tobii eye tracker .........................................................................................16
6.1 Download and install Tobii Pro Eye Tracker Manager...............................................16
6.2 Install Tobii Pro Spark in Tobii Pro Eye Tracker Manager..........................................16
6.3 Mount the eye tracker on a laptop or monitor ..........................................................16

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6.4 Display setup in Tobii Pro Eye Tracker Manager........................................................18
6.5 Calibration .....................................................................................................................19
6.5.1 What calibration does............................................................................................19
6.6 Detach the eye tracker .................................................................................................19
7Display Setups .................................................................................................................21
7.1 Standard setup..............................................................................................................21
7.2 Advanced setup ............................................................................................................21
7.3 Setup with Tobii Pro Tripod Stand ..............................................................................21
8Start Experimenting ........................................................................................................23
8.1 Start eye tracking..........................................................................................................23
8.2 Tobii Pro Lab .................................................................................................................23
8.3 Keep your eye tracker software and display setup updated ....................................23
8.4 Keep your display setup updated................................................................................23
8.5 Customer Care ..............................................................................................................24
9Product Care....................................................................................................................25
9.1 Operational environment ............................................................................................25
9.2 Transport and storage..................................................................................................25
9.3 Cleaning.........................................................................................................................25
9.4 Disposing of the Eye Tracker .......................................................................................25
9.5 Limitation of Liability ....................................................................................................25
10 Technical Specifications..................................................................................................27
10.1 Eye Tracking Specifications........................................................................................27
10.2 Setup............................................................................................................................27
10.3 Software Compatibility...............................................................................................28
10.4 Hardware Versions .....................................................................................................28
10.5 Tobii Pro Spark Eye Tracker Specifications...............................................................28
Appendix A Customer Care, Training, and Warranty .....................................................29
A1 Customer Care .........................................................................................................29
A1.1 Get help online .................................................................................................29
A2 Training and Education Services.............................................................................29
A3 Warranty information..............................................................................................29
Appendix B Limitations and Considerations...................................................................30
B1 Intended Use............................................................................................................30
B2 Light Conditions .......................................................................................................30
B3 Eye Lashes ................................................................................................................30
B4 Droopy Eyelids .........................................................................................................30
Appendix C Glossary ..............................................................................................................31

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1Introduction
Figure 1. Tobii Pro Spark.
Tobii Pro Spark is a compact, high-performance data collection solution that you can take
into the field. Use Tobii Pro Spark when your research takes you to locations and to
subjects that would otherwise be hard to bring to the lab. You can collect data in
classrooms, hospitals, libraries, and other locations where your subjects are easier to
recruit.
With sampling frequencies of up to 60 Hz, one eye tracking camera, and two pupil tracking
modes (bright and dark pupil), Tobii Pro Spark enables you to adapt your data collection
setup to different research populations and scenarios.
Use Tobii Pro Spark for studies on:
•Windows, macOS, and Linux laptop and desktop computers
•27″ (16:9) monitors, or smaller
•Real-world setups such as physical objects and social interactions (using the
Tripod Stand)
•Projections, simulators, and larger screens (using the Tripod Stand)
Tobii Pro Spark is primarily designed for use in indoor office environments with adult
participants.
1.1 Symbols used in this document
The Information symbol means something is important or needs special
attention.
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.
1.2 Tobii Pro Eye Tracker Manager
Tobii Pro Eye Tracker Manager is free software available on Tobii Connect.

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Tobii Pro Eye Tracker Manager helps you manage your screen-based Tobii eye tracker. It
lets you see which eye tracker firmware and software versions you are running and
facilitates updates (where applicable). It provides:
•Drivers and Firmware installation or updates
•Display setup
•Positioning guide
•User calibration
•Gaze visualization1
References in product documentation to Tobii Pro Eye Tracker Manager
refer to the latest version available on Tobii Connect.
1Gaze visualization in Tobii Pro Eye Tracker Manager lets you quickly evaluate the quality of the eye tracking data. The
gaze visualization overlaps data only on the Tobii Pro Eye Tracker Manager screen while Tobii Pro Eye Tracker Manager is
open.

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2System requirements
2.1 Tobii Pro Spark system requirements
Operating system:
Windows 10, Windows 11
macOS 10.15 Catalina and 12 Monterey
Linux Ubuntu 20.04
CPU:
1 GHz, 2 cores
RAM:
2 GB RAM memory*
*Software for eye tracking research may require higher RAM
Port:
USB port
**
Type-A or USB Type-C (with included adaptor)
**The average power consumption during usage is 2.0W, but
the eye trackers power consumption can peak up to 5-6W
depending on the use case. For example, when the
illuminators first turn on, the consumption can briefly spike
(a matter of milliseconds) at around 5-6W. The Tobii Pro Spark
officially works with USB 2.0 BC1.2 which can handle spikes
up to 7.5W.
2.2 Additional software options
Tobii Pro Lab
https://www.tobii.com/products/s
oftware/data-analysis-tools/tobii-
pro-lab
Tobii Pro Lab is a comprehensive research software plat-
form for eye tracking designed to me
et the highest
demands on different research scenarios with exact timing
accuracy. 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.
Tobii Pro SDK
https://www.tobii.com/products/s
oftware/applications-and-
developer-kits/tobii-pro-sdk/tobii-
pro-sdk
Tobii 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
programming 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.

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3Safety Declaration
3.1 Mounting Warning
Tobii Pro Spark should be mounted according to Tobii’s instructions for approved
mounts.
The mounting bracket is designed to stick to a variety of displays, such as
monitors and laptop screens. It is also designed to be removed cleanly. 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 placed above the user, as it might fall.
3.2 Emergency Warning
This eye tracker is designed to be used for research purposes only. 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.
3.3 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.
This can happen even if the person has no medical history of epilepsy or has
never had any epileptic seizures.
A person with photosensitive epilepsy is likely to experience similar problems
with TV screens, certain 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 during
use, move your eyes away from the eye tracker.
3.4 Infrared Warning
When activated, the eye tracker emits pulsed infrared (IR) light. Certain medical
devices are susceptible to disturbance by IR light and/or radiation. Do not use
the eye tracker in the vicinity of such medical devices, as their accuracy or proper
functionality could be inhibited. Do not stare into the LED lights at a close
distance (<15cm).

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3.5 Magnetic Field Warning
This eye tracker contains magnets. Magnetic fields may interfere with the
function of cardiac pacemakers and implantable cardioverter defibrillators.
Maintain a minimum distance of 6 inches (15 cm) between the eye tracker and
your heart device.
3.6 Child Safety
An 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 can become separated from the device, presenting a
potential 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.
3.7 Electricity
Do not open the casing of the eye tracker, as doing so 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 Customer
Care if your eye tracker is not working properly.
3.8 Environment
This eye tracker is designed for use in dry indoor environments. Avoid any
exposure to direct sunlight as this will affect eye tracking quality and longer
exposure can overheat the equipment. Avoid exposure to any liquids, gels,
moisture, rain, sweat or other damp materials and environments. Do not use the
eye tracker near water – the device is not water resistant. Keep the eye tracker in
a clean and dust free environment. When using the equipment take adequate
precautions against dust and dirt. Do not place or use the equipment in places
that are subject to extreme temperatures and humidity, such as on top of and or
near a heating element, in a hot or damp room, or in a hot automobile.
3.9 Electricity
Only use accessories provided by or approved by Tobii AB.
3.10 Third party
Use of a Tobii eye tracker beyond its intended use or together with third-party
software or hardware that changes the intended use is a risk. Tobii AB does not
take any responsibility for the consequences of such use.

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4Compliance Declaration
4.1 EU Compliance
CE Statement
Tobii Pro Spark is CE-marked, certifying compliance with the essential requirements
for health, safety, and environmental protection requirements for the European Single
Market. Tobii Pro Spark complies with the following directives:
•2014/30/EU (EMC) - Electromagnetic Compatibility Directive.
•2011/65/EU (RoHS) and (EU)2015/863 - Restriction of Hazardous Substances
Directive.
Other EU Directives and Regulations
Tobii AB and Tobii Pro Spark comply with the essential requirements of the following EU
directives and regulations:
•2012/19/EU (WEEE) - Waste Electrical and Electronic Equipment Directive.
•1907/2006 EC (REACH) - Registration, Evaluation, Authorization and Restriction of
Chemicals.
Furthermore, Tobii AB complies with applicable parts of the Directive 94/62/EC on
packaging and packaging waste.
Manufacturer Contact Information
Tobii AB
Karlsrovägen 2D
S-182 53 Danderyd, Sweden
4.2 UKCA Compliance
Tobii Pro Spark is UKCA-marked, certifying compliance with the essential
requirements for health, safety, and environmental protection requirements for the GB
market. Tobii Pro Spark complies with the following Statutory Instruments:
•The Electromagnetic Compatibility Regulations 2016. UK Statutory Instruments
2016 No. 1091.
•The Restriction of the Use of Certain Hazardous Substances in Electrical and
Electronic Equipment Regulations 2012. UK Statutory Instruments 2012 No. 3032.
Other UK Legislation
Tobii AB and Tobii Pro Spark comply with the essential requirements of the UK regulations
regarding WEEE, REACH, packaging, and packaging waste.

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UK Importer Contact Information
Tobii UK Limited
1st Floor, Advantage House, 87 Castle Street
RG1 7SN Reading, United Kingdom
4.3 FCC Interference Statement
Tobii Pro Spark has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. Tobii Pro
Spark generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If Tobii Pro Spark does cause harmful interference to radio or
television reception, which can be determined by turning Tobii Pro Spark off and on, the
user is encouraged to try to correct the interference using one or more of the following
measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between Tobii Pro Spark and the receiver.
•Connect Tobii Pro Spark into an outlet on a circuit different from that to which the
receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
Modifications not expressly approved by Tobii AB could void the user’s authority to
operate Tobii Pro Spark under FCC rules.
U.S. Responsible Party Contact Information
Tobii Technology, Inc.
12007 Sunrise Valley Dr # 400, Reston
VA 20191, USA
4.4 ISED Statement
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
4.5 Australia and New Zealand Compliance
Tobii Pro Spark is registered in the Australian National Equipment Registration
System.

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Tobii Pro Spark is RCM-marked which signifies compliance with the Australian and New
Zealand product safety requirement for electrical and electronic equipment according to
EESS and radio communication and electromagnetic compatibility according to ACMA.
4.6 Japan Compliance
Tobii Pro Spark is VCCI-marked which signifies Tobii Pro Spark is compliant with emission
(interference) standards in Japan.
4.7 Korea Compliance
Tobii Pro Spark is KC-marked which signifies compliance with Korea’s product safety
requirements for electrical and electronic equipment.
Certificate number:
R-R-TBI-ET5
4.8 Safety Compliance
Tobii Pro Spark complies with the following standards:
•EN IEC 62471:2008, Photobiological safety of lamps and lamp systems.
•EN 62368-1:2014 +A11, Audio/video, information and communication technology
equipment - Part 1: Safety requirements.
•IEC 62368-1:2014, Audio/video, information and communication technology
equipment - Part 1: Safety requirements.
Including national deviations for Australia, New Zealand, United States, Canada and
Japan.
•GB 4943.1-2011, Information technology equipment -Safety - Part 1: General
requirements.

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4.9 EMC Compliance
Tobii Pro Spark complies with the following standards:
•EN 55032:2015/A11, Electromagnetic compatibility of multimedia equipment -
Emission requirements.
•EN 55035:2017/A11, Electromagnetic compatibility of multimedia equipment -
Immunity requirements.
•FCC 47 CFR Part 15, Subpart B, Class B.
•ICES-003 Issue 7 Class B, Information Technology Equipment (including Digital
Apparatus).
•CISPR32:2015, Electromagnetic compatibility of multimedia equipment - Emission
requirements (International standard accepted in AS/NZS and Japan).
•KN32, Electromagnetic interference prevention test for multimedia equipment.
•KN35, Electromagnetic wave immunity test for multimedia devices.
4.10 RoHS Compliance
RoHS compliance for Tobii Pro Spark is achieved by following the standard:
•EN IEC 63000:2018, Technical documentation for the assessment of electrical and
electronic products with respect to the restriction of hazardous substances.
4.11 Waste Disposal and Recycling
Tobii AB is committed to reducing the environmental impact of our products throughout
their lifecycle, from manufacturing to use and disposal. We are a member of various
compliance schemes for collection, recycling, and re-using of electronic waste, batteries,
and packaging of our products.
Tobii Pro Spark is marked with the crossed-out wheeled bin symbol, which indicates
that it must not be disposed of with household waste. You can return your used Tobii
Pro Spark to one of the municipality's recycling centers free of charge.
For more information about the WEEE directive and recycling at Tobii, please visit:
How we run our business
or

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5Overview of Tobii Pro Spark
Tobii Pro Spark is the next generation of compact high-performance eye trackers from
Tobii AB. It provides a flexible solution that supports different research scenarios and
study designs.
Tobii Pro Spark has a slim design that integrates well with external monitors up to 27
inches and laptop screens. The eye tracker can also be mounted on a tripod and coupled
with a scene camera so it can be used in study setups that use real-world stimuli such as
physical objects or scenes.
Use Tobii Pro Spark for studies on:
•Laptop and desktop computers
•PC monitors, 27″ (16:9) or less
•Real-world setups such as physical objects and social interactions (using the
Tripod Stand)
•Larger screens, projections, simulators (using the Tripod Stand, available
separately)
5.1 Tobii Pro Spark versions
Tobii Pro Spark is available in only one product version: 60 Hz.
5.2 How Tobii Pro Spark works
During tracking, Tobii eye trackers use 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.
Tobii Pro Spark is a mono camera system that cycles between dark and bright pupil
tracking. Complex mathematics is used to calculate the 3D position of each eyeball along
with the gaze point (where the participant is looking).

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5.3 What is in the Pro Spark box
Figure 2. Tobii Pro Spark box and included items.
#
Item
Additional information
1
Travel case
Stores, protects, and carries Tobii Pro Spark eye
tracker and the included accessories
2
Tobii Pro Spark eye tracker
Used for eye tracking
3
Flex mount
Tobii eye tracker mounting kit for curved monitors or
monitors that have very slim bezels
4
USB Type-C male to Type-A female
adapter plug
Used when the computer has a USB Type-C port
5
Cleaning cloth
For cleaning the surface of the eye tracker
6
Four mounting brackets with non-
permanent adhesive
Attaches Tobii Pro Spark to the screen bezel
7
USB extension cable
USB 2.0 Type-A extension cable (1m)
Two cleaning wipes
Removes any dust and grease in the area around the
screen before attaching a mounting plate
Safety and Compliance Declaration
Printed versions of important regulatory information

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5.4 How to use the USB Type-C male to Type-A female adapter
Tobii Pro Spark is connected to a computer via a standard USB Type-A interface.
If your computer has a USB Type-C interface, you can use the included USB Type-C male
to Type-A female adapter.
Figure 3. Tobii Pro Spark cable and adapter.
5.5 Tobii accessories
Find out more about Tobii products and accessories on the Tobii product page.

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6Set up your Tobii eye tracker
At the end of this setup, you will have a verified installation that is ready for use.
6.1 Download and install Tobii Pro Eye Tracker Manager
The first step is to get the free software, Tobii Pro Eye Tracker Manager on your computer.
Setting up your eye tracker involves installing the necessary drivers and software on your
computer. Tobii Pro Eye Tracker Manager makes this easy.
Your eye tracker does not need to be connected to the computer to install
Tobii Pro Eye Tracker Manager.
1. Before starting, double-check the hardware and system requirements. You should
also check the requirements for your analysis software, for example, Tobii Pro Lab.
2. Download Tobii Pro Eye Tracker Manager on Tobii Connect.
3. Open Tobii Pro Eye Tracker Manager and follow the prompts to finish installation.
6.2 Install Tobii Pro Spark in Tobii Pro Eye Tracker Manager
Now it’s time to make sure your computer can communicate with your eye tracker. This
is necessary for downloading the proper driver updates.
1. Open Tobii Pro Eye Tracker Manager if it is not already open.
2. Connect Tobii Pro Spark's USB cable to a Type-A port in your computer or use the
provided adaptor to connect to a Type-C port. Do not mount the eye tracker just
yet to plug in the USB so you can make sure everything is working.
3. If your Tobii Pro Spark is connected to the USB port but does not appear in the list
of connected eye trackers, select the plus (+) symbol in the upper right corner to
install (or reinstall in some cases) the required drivers. Sometimes removing the
USB and plugging it in again is necessary.
4. Select Tobii Pro Spark and select Install.
5. Follow the prompts in Tobii Pro Eye Tracker Manager to finish the installation.
6.3 Mount the eye tracker on a laptop or monitor
To ensure quality in eye tracking data, the Tobii Pro Spark hardware package includes
several mounting brackets that can be affixed to a laptop or monitor. You can easily snap
the eye tracker on and off the laptop using the magnetic mounting bracket. The mounting
bracket sticks to the frame with a special adhesive that does not damage the underlying
surface when the bracket is removed. For more information, read Detach the eye tracker.

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If the screen bezel is thinner than the height of the eye tracker, affix the
mounting bracket as low as possible on the screen frame, or directly on the
screen. DO not use this setup if you intend to show stimuli in the lower part
of the screen, as they might be covered by the eye tracker.
For this we could recommend the Flex Mount, which is designed to fit most
screen shapes and forms as you can adjust the angle of the Flex Mount to
ensure that the eye tracker can always face you.
Some laptops are very thin and there is little space between the screen and
the keyboard when the laptop is closed. We recommend that you check
whether the laptop can close with the mounting bracket present before you
attach it.
What to do:
1. Make sure the eye tracker is attached to the monitor and connected to your
computer. Open Tobii Pro Eye Tracker Manager. You should be able to see and
expand your eye tracker’s “card” in Tobii Pro Eye Tracker Manager. The serial
number of your eye tracker should match the number displayed.
2. You can leave your eye tracker USB cable connected with the eye tracker to the
side (for example on the table) or you can disconnect it while you attach the
mounting bracket.
3. If you plan to attach the eye tracker to a laptop, make sure the laptop can close
with the magnetic mounting bracket attached. Some laptops have very little space
when closed.
You can test whether you can close the laptop with the mounting bracket
by placing the mounting bracket (with the backing paper still attached) on
the keyboard side of the laptop and carefully closing the laptop lid. Watch
for any potential interference between the screen, bracket, and keyboard.
4. Find the center of the screen and clean the bezel with one of the included cleaning
wipes.
5. Peel the adhesive tape off the mounting bracket and mount it on the bezel so that
your Tobii Pro Spark is as close to the bottom of the screen as possible without
covering the screen. Press the bracket against the bezel for 30 seconds and wait
one hour before attaching the eye tracker.

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Figure 4. Mounting brackets with non-permanent adhesive.
6. Attach the eye tracker, making sure that it aligns properly with the mounting
bracket. The magnet holds the eye tracker firmly in place when the slots are lined
up correctly.
7. If it is not yet connected, plug in the eye tracker’s USB cable to the correct USB port
in your computer.
8. Move to the next step.
6.4 Display setup in Tobii Pro Eye Tracker Manager
Now the algorithms on the eye tracker need to understand where the eye tracker is in
relation to the screen and map the gaze points accordingly.
1. Open Tobii Pro Eye Tracker Manager if it is not already running and select your
eye tracker.
2. On the Overview tab, locate Display Setup and select the ellipsis icon to the right.
On the drop-down menu, select New.
3. Select Regular setup and select Next.
4. If multiple screens are used, select the screen that has the Tobii Pro Spark
attached to its bezel.
5. Enter the position of the eye tracker in relation to the screen. Use the radio
buttons to select whether the eye tracker is positioned under or over the screen
and enter the measurement in millimeters.
6. Align the dotted blue lines on the screen with the two outer white marks on the
top of your Tobii Pro Spark.
7. Save your display by naming the setup and selecting Save.
8. To confirm that Tobii Pro Spark can detect your eyes, enable the Position Guide at
the bottom left of Tobii Pro Eye Tracker Manager. Once activated, you should be
able to see two “eyes” in a face contour.
9. Move to the next step. In the next section, you will test your setup by performing
a calibration. For more information, read Calibration.
You can always return to Tobii Pro Eye Tracker Manager and use it when
you change computers or screens or want to recalibrate.

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6.5 Calibration
When you are done configuring your eye tracker, you should run a calibration to test to
see if the eye tracker is mapping the gaze points correctly to your display.
How to test your eye tracking setup in Tobii Pro Eye Tracker Manager:
1. Make sure the eye tracker is attached to the screen bezel and connected to your
computer. Open 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. Select Calibrate in Tobii 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. Select Recalibrate to improve an unsuccessful
calibration (e.g., recalibrate points with missing data). Select Use Calibration
when you are satisfied with the calibration.
You can toggle on and off Gaze Visualization in the upper left corner of the
Calibration Results window (or on the Overview tab). This can be used to
confirm the participant’s calibration results.
6.5.1 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 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 accurate gaze point calculation. Additionally,
some Tobii eye trackers use the calibration procedure to select the detection mode (e.g.
dark or bright pupil tracking) that provides the most accurate data.
You can do basic calibration in Tobii Pro Tobii Pro Eye Tracker Manager. There is more
functionality, including calibration validation, in Tobii Pro Lab.
For more information, read the articles on eye tracker calibration and on how to calibrate
and validate in Tobii Pro Lab.
6.6 Detach the eye tracker
To temporarily remove the eye tracker, gently pull it away from the magnetic mounting
bracket and leave the bracket in place.