If you enable eye tracking, when you glance at your keyboard for longer than the value in Keyboard Glance Tolerance, it will prevent your typing from affecting the typing test.

The first time you enable this, it will redirect you to an initial calibration test. All further uses of the eye tracker will save this calibration data.

If you need to recalibrate your data, the "Reset Eye Data" button will clear the calibration data so you can calibrate it again.

Keyboard Glance Tolerance (ms) means lower number = harder. If set to 0ms, typing is blocked immediately when you look down. If set to 5000ms, you can look down for 5 seconds before input is blocked.