Google did something similar in 2017 (although it's overlaying your WHOLE FACE) on the headset and only when viewed through a camera: https://blog.google/produc

Google did something similar in 2017 (although it's overlaying your WHOLE FACE) on the headset and only when viewed through a camera: https://blog.google/products/google-ar-vr/google-research-and-daydream-labs-seeing-eye-eye-mixed-reality/ https://blog.google/products/google-ar-vr/google-research-an...