We made a webcam eye tracker app that lets you control the camera in Star Citizen just by looking around. It is integrates both head and eye movements as inputs for OpenTrack.
Watchful Eye - COD Tracker
Take flight with head tracking -- Tobii Eye Tracker 5 review — GAMINGTREND
I used an EYE TRACKER in Warzone & things got WEIRD... - YouTube
We made this webcam eye tracker app that lets you control the camera in flight and combat sims using your eyes! It's a first to combine both head AND eye movements using
Using an EYE TRACKER in Warzone but CHEATERS are everywhere... - YouTube
With the recent Tobii Eye Tracker 5 firmware update (thanks u/CaptainSnackbar - link in comments), I think I've gotten my setup nice and stable with help from u/funnybuttnoises. Feel free to try
Season Six Patch Notes for Call of Duty: Warzone - COD Warzone Tracker
Eye tracking hits a level of maturation - Tobii EyeX eye tracker review — GAMINGTREND