Optical illusions

Each point of the image formed at the retina is analyzed and then transmitted to the brain in the form of coded signals.
This is in theory similar for all.
In fact the visual zones of the brain analyze these signals and give us a representation of the perceived object.
Interpretation that makes the brain of it can sometimes be ambiguous and these mistakes in interpretation cause sometimes "optical illusions", which are not perceived in the same way by everyone.

Here is one of the most incredible illusions of the world : the illusion of E. Adelson called "Checker Shadow"

The grey of area A is rigorously the same than the grey of area B

3 categories :
> The geometrical illusions
> The artistic illusions
> The best illusions of the world

 

© Edward Adelson with his authorization