Eyetrackers

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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:

http://www.visionspace.at/index.php?id=3&L=1

Downloads

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

  • 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

iView X

Downloads

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