An Optical Illusion (also called a visual illusion) is characterized by visually percieved images that differ from objective reality. The information gathered by the eye is processed in the brain to give a percept that does not tally with a physical meaurement of the stimulus source. There are three main types : Literal Optical Illusions that create images that are different from the objects that make them, Physiological Illusions that are the effects on the eyes and brain of excessive stimulation of a specific type(brightness, tilt, color, movement), And, the Cognitive Illusion where the eye and brain make unconscious inferences.
Now, leaving behind the Technical explaination of the Illusion, we get straight to Interesting Part of these Illusions.
A Great Illusion!There are different names for this illusion, but the Scintillation Grid is probably the proper name. This illusion was found by Elke Lingelbach of the Institut fur Augenoptik Aalen in Germany, and is a modification of an illusion called the Hermann Grid, which dates from 1870!
Moving Wave :-
This wonderful illusion was created by A.Kitaoka in 2004, who owns the copyright. You can see more illusions on his web site.
(Download the Illusion)
The Amazing Dots :-
Tthen you should see see the purple dots disappear.... but they haven't really gone. It is an after image effect, sometimes called a 'negative retinal afterimage' - move your head slightly, and the dots will reappear... amazing or what?
This illusion was designed by Jeremy L Hinton of Bristol, UK, and this illusion - with a lot more explanation and many other illusions as well - can be found at the web site of Michael Bach.
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