Eyetrackers

SR Research

SR Research EyeLink II

EyeLink II

The EyeLink II system consists of three miniature cameras mounted on a padded headband. Two eye cameras allow binocular eye tracking or selection of the subject’s dominant eye.

An optical head-tracking camera integrated into the headband allows accurate tracking of the subject’s point of gaze without the need for a bite bar.

Specifications

EyeLink II
500 Hz binocular eye monitoring
0.5º average accuracy
Access eye position data with 3.0 msec delay
0.01º RMS resolution
High quality computer based or scene camera eye tracking
Fast and simple participant setup, calibration, and validation

EyeLink 1000

http://www.sr-research.com/eyelink1000.html

The core of the EyeLink 1000 eye tracker consists of a custom designed high-speed camera connected to a dedicated Host computer. Running on a real-time operating system, the Host software provides extremely fast eye sample access with incredibly low inter-sample variability, accessed via a set of programming interfaces for multiple operating systems and programming languages

Specifications

Eyelink 1000 and Eyelink 1000 Plus
Sampling Rate	Head Supported: 2000 Hz Monocular / 1000 Hz Binocular Remote / Head Free: 500 Hz Monocular
Accuracy	Head Supported: 0.25º -0.5º average accuracy Remote / Head Free: 0.5º average accuracy
Real-time Data Access	Head Supported: 1.4 msec (SD < 0.4 msec) @ 2000 Hz Remote / Head Free: 3 msec (SD < 1.2 msec) @ 500 Hz
Participant Setup	Very simple and easy. Typically less than 2-5 minutes
Resolution	Head Supported: 0.01º RMS, micro-saccade resolution of 0.05º Remote / Head Free:0.05º RMS, saccade resolution of 0.25

Full specifications: http://www.sr-research.com/pdf/techspec.pdf

Matlab calibration example

Eyelink 1000 plus setup

Here is a tutorial video on how to setup Eyelink with a participant: Eyelink setup and calibration tutorial video.

From the SR-Research support forum, about placement of monitor, camera and participant:

Ideally, the Desktop mount should be placed between 50-70 cm from the participant's eyes and be centrally aligned with the Display monitor from the participant's perspective. When using a wide screen monitor it will need to be sufficiently far away from the participant that it fits within the trackable range of the system. As a rule of thumb it will need to be at a distance at least 1.75 times its width (so a 40 cm wide monitor would need to be at least 70 cm away). As widescreen monitors are typically around 50 cm wide, they will need to be placed at least 90 cm away. This means that, in order for the camera to be placed correctly (50-70 cm from the participant's eyes) it will need to be brought forward from the monitor 20-30 cm.

The top of the EyeLink camera and illuminator should also be as high as possible in the participant's field of view without obstructing any part of the display.

FAQ: What is the ideal configuration EyeLink 1000 / EyeLink 1000 Plus Desktop mount? Original is here on the sr-support forum (need to sign-in): https://www.sr-support.com/showthread.php?tid=206

The original image is from the sr-research support forum. It is found here (sign in needed).

Tobii

Tobii T60

Tobii TX300

Tobii T60/T120

The Tobii T60 and T120 Eye Trackers are integrated into a 17" TFT monitor. They are ideal for all forms of eye tracking studies using screen based stimuli.

There is a Tobii setup in the babylab, which is in a fixed lab setup.

There are also two mobile Tobii setups. Please contact Gero Lange for booking requests. Please keep in mind that these mobile setups are booked _without_ a room. If you plan to use these eyetrackers, make sure to also book a room that can be locked. You can use it in a cubicle, as long as you make sure that the eyetracker is stored in a locked room at the end of the day.

Lab setup

http://tsgdoc.socsci.ru.nl/index.php?title=Tobii_Eye_Tracker

Specifications

	Tobii T60 Eye Tracker	Tobii T120 Eye Tracker1
Accuracy (degrees)	0.5	0.5
Drift (degrees)	< 0.3	< 0.3
Freedom of Head Movement (cm)	44 * 22 * 30	30 * 22 * 30
Data Rate (Hz)	60	120
Binocular Tracking	Yes	Yes
Display Size (inch)	17	17
Display Resolution (px)	1280 * 1024	1280 * 1024
Bright/Dark Pupil Tracking	Both - automatic optimization	Both - automatic optimization
Eye Tracking Server	Embedded	Embedded
User Camera	Built-in	Built-in
Audio	Built-in Speakers	Built-in Speakers

¹The Tobii T120 Eye Tracker can also run in T60 mode with full head movement box

Presentation plugin, including documentation on how to install and how to use it:

https://www.fh-joanneum.at/en/projekt/visionspace-wahrnehmungslabor/

Downloads

• How to use a Tobii TX 300 eyetracker

• Getting Started Guide

• Tobii Eyetrackers Extension for use with Presentation (including samples and documentation) (zip)

• Neurobs Presentation plugin & documentation

Lab setup

http://tsgdoc.socsci.ru.nl/index.php?title=Tobii_Eye_Tracker

Tobii TX300

Specifications

	Tobii TX300 Eye Tracker1
Precision(degrees)	< 0.1
Accuracy (degrees)	0.5 (Monocular), 0.4 (Binocular)
Freedom of Head Movement (cm)	37 * 17 (at 65 cm distance)
Data Rate (Hz)	60Hz, 120Hz or 300Hz
Binocular Tracking	Yes
Display Size (inch)	23
Display Resolution (px)	1920 * 1080 (max 60Hz)
Tracking method	Dark Pupil Tracking
Eye Tracking Server	Embedded
User Camera	Built-in (640x480@30fps)
Audio	Built-in Speakers (3W)

SensoMotoric Instruments (SMI)

SMI RED500

SMI iView X

SMI RED500

How to connect SMI RED 500 eyetracker (Scheme)

Downloads

• IView User Manual

• Presentation Extension (zip)

• Example Presentation Script (zip, new script since 2018-06-05) An example script that connects and communicates with the IViewX program. It shows two pictures side by side. Data can be analysed using BeGaze. There are a lot of explanations in the files. The comments will help understanding how to use an SMI eyetracker in Presentation.

Source code: SMI-Eyetracker-Example.sce , SMI-Eyetracker-ExampleINFO.pcl SMI-Eyetracker-ExamplePCL.pcl SMI-Eyetracker-ExampleSUBS.pcl

• Python Script (zip)

iView X

Downloads

• iView X Manual

• Presentation Extension (zip)
• Example Presentation Script (zip, new script since 2018-06-05) An example script that connects and communicates with the IViewX program. It shows two pictures side by side. Data can be analysed using BeGaze. There are a lot of explanations in the files. The comments will help understanding how to use an SMI eyetracker in Presentation.

Source code: SMI-Eyetracker-Example.sce , SMI-Eyetracker-ExampleINFO.pcl SMI-Eyetracker-ExamplePCL.pcl SMI-Eyetracker-ExampleSUBS.pcl

• Python Script (zip)