[faeyanpiraat]

Unfortunately built in webcams do not have sufficient resolution and low enough latency to be suitable for this purpose.

[dmortin]

Maybe it could be worth it to buy a proper external camera for this purpose if one has a desktop or uses one's laptop most of the time stationary.

I searched for it and apparently Windows 10, for example, has optional eye tracking control built in already:

https://support.microsoft.com/en-us/help/4043921/windows-10-...

[yjftsjthsd-h]

I have used https://eviacam.crea-si.com/ on a laptop successfully.