You scan the horizon, your view an expanse of hill, field and sky, then you focus in on a detail,
maybe a bird or a tree. Does your perceptual world contract to a shrunken fragment?
No, it stays the same size or maybe even expands. As your attention homes in,
so there is a mental blossoming – what was coarse-grained becomes finescale.
A blog post about 'patch watching' and perception http://robymilling.blogspot.com/