Originally Posted by
Uplinker
If you look towards the far end of the runway while flaring, you can perceive your rate of descent as a changing angle to the runway. You will see the runway edges or edge lights moving upwards in your peripheral vision.
If, instead, you look at your landing spot on the runway, you cannot see this changing angle so easily, which makes it harder to judge your rate of descent.
I find it interesting that these basics apparently need thorough discussion here, on a professional pilots forum.