@user-9b6d86 answering here, as it was related to VR.

• Yes, you would get eye tracking data, what data in specific do you have in mind?
• No, the add-on would not fit the Oculus Quest. It is compatible only HTC Vive, Vive Pro and Vive Cosmos. For other HMDs, you would need to develop your own mounts that fit the geometry and constraints of the headset.

• several eye-tracking data I need is gaze coordinates (x, y, z), average fixational eye movements and the viewing duration in each AOI, also the average speed of eye movements. Do that data can be obtained from the add-on?
• oh I see, thank you @user-d407c1

You can check the data directly exposed at https://github.com/pupil-labs/hmd-eyes/blob/master/plugin/Scripts/PupilData.cs You can run the fixation detector as well, within Pupil Capture Speed movements you will need to compute them by yourself

For the AOI, you can use https://github.com/pupil-labs/hmd-eyes/blob/master/docs/Developer.md#map-gaze-data-to-vr-world-space

Hello, can the PyPlr package be used with eyetracking and the VR headset. For example, getting timestamps for pupil changes with changes presented through VR? Thanks!

Does htc vive support eye-tracking software ?

@user-9eed85 if you use vive pro eye, then yes! but mostly for interaction purposes.