A.L.Yarbus (1967) /956 The human eyes voluntarily or involuntarily fixate on those elements of a visual scene that carry essential and useful information.The more information is contained in an element,the longer the eyes stay on it. -The distribution of fixations on the elements of a scene changes depends on the purpose of the observer. Hence people who think differently also,to some extent,see differently. The human eyes voluntarily or involuntarily fixate on those elements of a visual scene that carry essential and useful information. The more information is contained in an element, the longer the eyes stay on it.  The distribution of fixations on the elements of a scene changes depends on the purpose of the observer. Hence people who think differently also, to some extent, see differently. A.L. Yarbus (1967)