EyeLink
About EyeLink
The EyeLink eye trackers, produced by SR Research, are one of the most commonly used eye trackers in psychological research. SR Research provides Python bindings for communicating with the EyeLink (called PyLink), which are used by PyGaze and their own EyeLink Plugin.
Installing PyLink
The Python library for EyeLink integration is available on PyPI as sr-research-pylink. It has full support for Windows, macOS, and Linux across Python 2.7 to 3.14, so it can be installed in the latest OpenSesame installations.
You can install it directly from the terminal:
pip install sr-research-pylink
Important: Do not try to install pylink by running pip install pylink. Doing so will install a completely different, unrelated package!
You can find more information about sr-research-pylink on the SR Research forum (free registration required):
PyGaze
After you have installed PyLink using the instructions above, you can use the EyeLink with PyGaze! See:
SR Research EyeLink Plugin
SR Research also provides their own EyeLink plugin set for OpenSesame. This plugin offers additional EyeLink integration not available through PyGaze, such as a gaze trigger, EDF transfer when a task is aborted, and full support during camera transfer for recent EyeLink models. To install their plugin, run:
pip install opensesame-plugin-eyelink
For more information, please visit:
Optional: EyeLink Developers Kit
While no longer required to run PyLink in OpenSesame, the EyeLink Developers Kit (sometimes called EyeLink Display Software) provides additional useful tools, such as the edf2asc converter, documentation, and offline sr-research-pylink installation files (.whl).
If you need these utilities, you can find the installers for Windows, macOS, and Ubuntu repositories on the SR Research Support site: