Optical Illusions!

I basically posted everything that I new about color in my last post, sooooooo....I get to talk about OPTICAL ILLUSIONS! Illusions, not Allusions. It bothers me when people mess up that word.

Link: http://www.geckoandfly.com/wp-content/uploads/2007/10/dot-illusion.gif

Link: http://unrealitymag.com/wp-content/uploads/2009/12/optical_illusions_2.png

I find this INCREDIBLE! I cannot believe that art can actually fool the human eye. In the first picture, I definitely think that the lines look slanted, but I know that they are straight. In the 2nd image, I am not sure what is going on--I cannot tell if animation is what makes the pink dot disappear. What I do know is that there are no green dots (follow the disappearing dot with your eye, and you won't see green!)