The Valve Index VR headset has been around for a few years now. It doesn’t come with eye or face tracking, but that didn’t stop inspired folks like [Physics-Dude] from adding DIY solutions in elegant and effective ways using a combination of hardware, open software, and 3D printable parts.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/05/19/diy-eye-and-face-tracking-for-the-valve-index-vr-headset/