The visual ability to distinguish the world in three dimensions, tied with the
ability to measure how far away an object is called depth perception. A monocular cue is any inducements related to depth perception that can
be perceived through the use of one eye alone that is in contrast to binocular
cues, which require the use of both eyes to perceive depth.
The
monocular depth cue in which an object, that is blocking another object, is
perceived as closer is called overlap (interposition). It forms the appearance that the object that is
being covered, or overlapped, is the one that is further away.
