Some optical illusions you may enjoy :)

Here is just a small collection of optical illusions you may enjoy to look at. We looked at many such illusions in our Perception and Ergonomics class. We learned how the brain perceives images and interprets sensory data.

There are many more such illusions as well the science behind how they work at : http://www.michaelbach.de/ot/

and : http://www.optillusions.com/