Interesting etymology playing on a minimal pair (only one phoneme differs between the two words). Sight, or seeing, is defined as the delimitation of objects in space. This probably reflects the idea, prevailing in Greek conceptions, that the eye is the source of light, so that it is the sight itself which is active in identifying the objects and their shape, and delimitating them. A fuller redaction is preserved in the Byzantine Etymologica (see Parallels). The correct explanation as a derivative of ὁράω is of course found in the literature, but this was less appealing for someone fond of etymology, as too trivial.