Sorry C441, I was lazy with my quote. What I meant was that the moment to shift your gaze to the far end of the runway, is when the threshold passes under the nose of the aircraft, and the threshold passing under the nose of the aircraft is always going to happen, on every landing. From the FCTM;
When the threshold passes out of sight under the airplane nose, shift the visual
sighting point to the far end of the runway
I also understand that once the basics of landing are squared away and consistent, there are other things to consider such as horizons lowering due to poor visibility.
Cheers