Visual Attention

“…the visual system makes the assumption that the external world is, by default,
static and unchanging. By making this assumption, an internal representation of the
entire external world can be avoided in preference of a representation that focuses on one or a few pieces of information at a time. … In a dynamic world, if changing
information is not processed immediately, this information will be forever lost. Static information is continuously available and therefore the processing of it can be delayed with little consequence.” [Parkhurst 2002]