Tobii Eye Trackers
Introduction
Tobii Pro eye trackers are used to measure eye movement and pupil size.
Availability, support and advice
A Tobii eye tracker can be borrowed from SOLO through the Helpdesk (reservations tile). Note that only a limited amount of eye trackers is available. The Tobii eye trackers are supported by SOLO, for questions please contact labsupport.
System and software compatibility
See here for an overview of system and software compatibility for all Tobii eye trackers.
Eye tracker setup
How the eye tracker is set-up depends on the eye tracker model. See below for more information on the specific model. For questions, contact labsupport. When using a Tobii Pro remote eye tracker (Fusion, X3-120, X2-60, Nano) the eye tracker needs to be configured after connecting it to a computer. This configuration needs to be performed each time the eye tracker is connected to another computer. See the Eye Tracker Manager for instructions how to configure the eye tracker. Only after this setup, the eye tracker can be used with the desired task presenting software.
Tobii Pro eye tracker models
A list of Tobii eye tracker models that are (or were) used at FSW Leiden are given below. Note that this is not an exhaustive list of all Tobii Pro eye trackers. For currently available models, see the Tobii Pro website. For information on what software to use for screen based eye trackers (for both stimulus presentation and analysis), see the Tobii software guide.
Fusion
The Tobii Pro Fusion is a remote screen based eye tracker, sampling at 60, 120, or 250 Hz (250 Hz is not available by default). The bar can be connected to a monitor with a magnetic strip and is connected to the PC via USB. A Fusion eye tracker can be borrowed from SOLO through the Helpdesk (reservations tile).
X3-120
The Tobii X3-120 is a remote, screen based eye tracker sampling at 120 Hz (but note that pupil size samples at 40 Hz). The bar can be connected to a monitor with a magnetic strip and is connected to the PC via an external processing unit (EPU). An X3-120 can be borrowed from SOLO through the Helpdesk (reservations tile). The latest version of the manual and other X3-120 related products can be downloaded here.
X2-60
The Tobii X2-60 is a remote, screen based eye tracker sampling at 60 Hz. The bar can be connected to a monitor with a magnetic strip an is connected to the PC via a processing unit. For more information on the X2-60, see here. The latest version of the manual and firmware can be downloaded here.
T120
The Tobii T120 is a screen based eye tracker consisting of a screen with built in eye tracker, sampling at 120 Hz. The manual is available .
Glasses 2
The Tobii Pro Glasses 2 is a wearable eye tracker, sampling at 50 or 100 Hz. Data recordings are controlled by the Tobii Pro Glasses 2 Controller and data can be analyzed with Tobii Pro Lab (using an Analyzer license). For more information see the Learn how to use Tobii Pro Glasses 2 video. The manual and other Glasses 2 related products can be downloaded here.
Synchronization between Glasses 2 and other equipment
The Glasses 2 can send and receive pulses (TTL triggers) through a sync port, which enables synchronization between the Glasses 2 and other equipment (such as Biopac).
By default, the Glasses 2 sends synchronization pulses. These pulses, which consist of one bit (on or off), start when the recording starts with a sequence consisting of a 500 ms high pulse (3.3 V), followed by a 500 ms low pulse (0 V), repeated 3 times. After that, one pulse is emitted once every ten seconds and has a duration of 1000 ms. See the Glasses 2 User Guide (which can be downloaded here) for more information.
The Glasses 2 can also receive pulses. These pulses also consist of one bit (on or off) and can be sent from stimulus presentation software such as OpenSesame or E-Prime. The pulses are logged as SYNC IN HI and SYNC IN LOW events, as viewed in Tobii Pro Lab.
Sending pulses to the Glasses 2 is generally preferred over sending pulses from the Glasses 2, as it provides more flexibility in determining the timing of the triggers. Please contact labsupport for advice on your specific setup and synchronization needs. Labsupport can also provide the necessary cables for synchronization (whether it'd be sending or receiving pulses) and advice on electrical safety when using the sync port.
HTC Vive Pro Eye with Tobii Eye Tracking
The Vive Pro Eye is a VR headset that can be integrated with Tobii eye tracking. For more information, see also here.
Resources
- Tobii website
- Tobii instruction videos by FSW Leiden (note that the remote eye tracker configuration is outdated, see the Eye Tracker Manager for up-to-date instructions)
- Tobii Pro Academy: free online courses offered by Tobii
- The latest manuals and other Tobii products can be downloaded here
- What software and operating systems are compatible with Tobii pro eye trackers?