Chuck, please do re-write the article.
Simple geometry says you cannot judge height or sink rate by looking at a single distant point, so the end of the runway cannot be the only place to look.
One more thing on peripheral vision.
Human peripheral vision is good for night vision, and for detecting peripheral movement, but is almost useless apart from that. It is low resolution and not even in colour. You think you have all-round hi-res colour vision because the brain makes a mental map. In effect, the brain remembers what it has already looked at and fills in the gaps as required. It is very, very, good at that, but you must have actually looked at the thing first.
So as you come down final approach I would suggest you have a good look at the runway size and shape, and how the different bits move in relation to each other and the horizon.
It will improve your "peripheral vision" enormously.