Quick peek at the airspeed down low? At 50' you've got 2-3 seconds before it really gets busy so you've got enough time to look if you'd like.
I peek at the RA' during the flare, especially on the 737 HUD. Not everytime but often enough. Takes maybe a second? Actually relaxing your focus/scan/shifting what you're looking at prevents tunnel vision IMO and improves your total visual acuity. Time to from 100' to 10' is about 7 seconds, 10' to touchdown is about 5 seconds, so it's not THAT rushed.
IMO looking TOO hard(staring), is wrong. You see it with inexperienced pilots, just like you do with inexperienced drivers. Relax, see more by focusing less(hard to explain, more peripheal at less straight ahead acuity), and events happen slightly slower.
It's not uncommon to miss last second lateral drift or miss the de-crabbing right(centering effect) after touchdown. Both drift and crab reduce the 'quality' of the touchdown. It can be obvious to the PNF or a jumpseater while the PF misses it.