Mr N

You know how I love my optical illusions so here is a nice one from Mozilla. When I saw it first I just saw a mess of concentric circles. Now whenever I look at it, I can only see the 3D shape. http://developer.mozilla.org/en-US/demos/detail/hypnotic… more »

I love these kinds of things. The mystery of the disappearing pink dots:http://www.beforeiforget.co.uk/2009/what-do-you-see/ more »

An interesting illusion with a checker board. Are those lines parallel? http://hcpcrew.at/pix/illu_003.gif The second one is a bit rude: http://hcpcrew.at/pix/chinese.jpg more »

There is a really nice site that has gathered them together in one place. My 3 favourites are: Checker Board Illusion, How Can This Be True? and Count The Black Dots. Enjoy more »

I love weirdy graphics that make your eyes go funny. This is a fine example; all you have to do is say which way the girl is spinning?If you stare at it for a while she will change directions while you are watching! more »