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.

Configuring remote eye trackers

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.

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 and the eye tracker is connected to the PC via USB. A Fusion eye tracker can be borrowed from SOLO through the Helpdesk (reservations tile). For more information on the Fusion, see here.

X3-120

The Tobii Pro X3-120 is discontinued and cannot be purchased anymore. Its successor is the Tobii Pro Fusion.

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 an is connected to the PC via a processing unit. A X3-120 can be borrowed from SOLO through the Helpdesk (reservations tile). For more information on the X3-120, see here.

X2-60

The Tobii Pro X2-60 is discontinued and cannot be purchased anymore. Its successor is the Tobii Pro Fusion.

The Tobii X2-60 is a remote, screen based eye tracker sampling at 60 Hz. The bar can be connected to a monitor an is connected to the PC via a processing unit. For more information on the X2-60, see here.

T120

The Tobii T120 is discontinued and cannot be purchased anymore. Due to its age, support for the T120 is limited.

The Tobii T120 is a screen based eye tracker consisting of a screen with built in eye tracker, sampling at 120 Hz. 

Glasses 2

The Tobii Pro Glasses 2 is discontinued and cannot be purchased anymore. Its successor is the Tobii Pro Glasses 3.

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 on the Glasses 2, see the Tobii Pro Glasses 2 website and the Learn how to use Tobii Pro Glasses 2 video.

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 here.

Resources

Tags: Eye Tracking