"During the second phase - the hold off - pilots should continuously alternate their vision direction to simultaneously assess height above ground and pitch attitude (which is adjusted to maintain constant height just above the runway. When the landing attitude has been reached the aircraft is allowed to sink onto the runway. This attitude does not need exact precision, merely the nosewheel comfortably off the runway (to reduce nosewheel stress and minimise potential for porpoising)."
I look well along the runway, but don't know what else my vision is doing.
With a Jodel DR1050 my total cerebrum (and possibly cerebellum) neurons were involved in touching down and keeping straight. If told to alternate vision I'd never have got a PPL on a DH82 modification.