Eye-tracking is common technique in visual neuroscience, where the position and size of the pupil are recorded with a video. The position of the eyes can influence neuronal responses, while the size of the pupil correlates strongly with noradrenaline release and the level of behavioural arousal.
Several open-source eye-tracking programs are available, such as:
- EyeTracker
- FaceMap
- DeepLabCut
External references:
EyeTracker: https://github.com/JorritMontijn/EyeTracker
FaceMap: https://github.com/MouseLand/facemap
DeepLabCut: https://github.com/DeepLabCut/DeepLabCut