Not really. you need to know the size of the keyboard, know the shape ov peoples eyes, have enough temporal and optical resolution to workout where they are poi

Not really. you need to know the size of the keyboard, know the shape ov peoples eyes, have enough temporal and optical resolution to workout where they are pointing. Even with optimal conditions (ie dedicated cameras, no eye make up and correct positioning) uncalibrated gaze has at least a 5 degree uncertainty.