One of the startups in HTCs Vive X accelerator is releasing an upgrade kit that will add eye tracking to the Vive virtual reality headset. The Beijing-based company 7invensun will open preorders for its aGlass lenses next month, selling them in China for the equivalent of around $220; according to UploadVR, theyll be sold internationally around the third quarter of 2017.
The aGlass consists of two eyepieces that the average VR user can fit inside the HTC Vives face mask, including three pairs of interchangeable lenses. The eyepieces are connected to the Vive via USB, which will allow the headset to track pupil movement via sensors and infrared lights. Its an example of HTCs plan to expand the Vive ecosystem with third-party accessories, including custom controllers and other upgrade kits.
https://www.theverge.com/2017/5/1/15503932/htc-vive-x-7invensun-aglass-eye-tracking-upgrade
And this is why open source VR is good. Also tnx lashman for the link.