As of my knowledge cutoff in September 2021.

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, Vive Eye and Facial Tracking SDK is a software development kit (SDK) provided by HTC for integrating eye and facial tracking functionality into virtual reality (VR) applications developed for the HTC Vive headset.

The Vive Eye and Facial Tracking SDK enables developers to access and utilize the eye and facial tracking capabilities of the Vive Pro Eye headset. This technology allows for more immersive VR experiences by accurately tracking the user's eye movements and facial expressions. It can be used to create applications that respond to gaze direction, enable eye-controlled interactions, and capture facial expressions for avatar animations or social interactions.and more information visit to Adbacklist