How to land using horizon? source

I recently heard pilots discussing a landing technique that some instructors are now teaching. 

To assist new pilots in flaring, they instruct the pilot to adjust their attention toward the far end of the runway or horizon. There was some discussion that it won't work for a pilot short in height. As they look toward the end of the runway or horizon they are suppose to use some type of reference, such as "the horizon expanding".

What is this technique for landing and how is it suppose to help?

Update: According to the "Rod Machado" YouTube video provided below, it is the runway width that is the primary reference, not the horizon or end of the runway. The pilot is viewing the end of the runway for peripheral vision of the width.
I think the GIST here is:

Look far ahead. Don't look at whatever is directly in front of you.

It's the same as driving. If one looks at the piece of concrete just meters ahead, then the barricade will "pop out in front suddenly" or the bumper of the car is "in your face out of nowhere".

Our peripheral vision will guide us to wherever we want. It is natural and in-born, biologically. You just need to know where to look.