The appearance of objects in depth as perceived by normal binocular vision, The ability to perceive things in their actual interrelations or comparative importance, A reflecting glass or combination of glasses producing some kind of optical delusion or anamorphous effect when viewed in one way, but presenting objects in their true forms when viewd in another, adjective_ Pertaining to the art, or in accordance with the laws, of perspective, of, in or relating to perspective, obsolete providing visual aid