Head and eye gaze

Setup → Access → Head / gaze turns the device’s camera into a pointer: move your head to point, rest on a cell to select (dwell does the selecting). Calibration is one step — calibrate while looking at the centre of the screen. It runs entirely on-device; camera video never leaves the machine.

This is the built-in, no-extra-hardware option. Dedicated eye trackers that present as a mouse work with Dwell instead.