Show simple trick of artist everybody has noticed that the eyes byca in some portraits follow one wherever he goes in the room it is a bit uncanny to move about nn an apartment and have the eyes of a picture always upon one some superstitious persons are afraid to go into a picture gallery where portraits of their ancestors are to be found the effect Is simply an optical illusion and Is secured by having the eyes in the portrait looking directly toward the front under such circumstances the pupil is necessarily in the middle with tin nn equal amount 0 white 0 on each side this relation does not vary at all with tile the position of tile the observer no matter where you stand the pupil will be in the middle of the eye and tile hie eye will seem to be looking at you |