The comment I responded to just happened to be the one which made me wonder how far off the dystopian future was where mega corporations are scanning people's eyes, which is why I went and searched the internet for information and found that that future is actually very close. This made me a bit worried. Therefore I mentioned that piece of information here, hoping that it might reach someone in a position to change that future.
"One of the things I’m really excited about for future versions is getting eye tracking and face tracking in" - Mark Zuckerberg https://uploadvr.com/zuckerberg-quest-3-4-eye-face-tracking/
Here is their tech demo for full eye and face tracking for virtual avatars:
https://www.youtube.com/watch?v=86-tHA8F-zU