Strange times are these in which we live, when old and young are taught in falsehoods school. And the one man that dares to tell the truth is called at once, a lunatic and fool. - Plato
Only a part of what is perceived comes through the senses from the object. The remainder always comes from within. Artists, architects, stage artists, magicians and camoufleur either take advantage of optical illusions or try to avoid them. They are vastly entertaining, useful, deceiving or disastrous, depending upon the viewpoint.
Included in the introduction is a history of optical illusions and an initial discussion on understanding optical illusions.
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