Archive for the Illusions Category

Optical Illusions

Posted in Illusions, Visual Arts with tags on April 30, 2009 by smorkpress

Do you remember the story of Dr. Jekyll and Mr. Hyde? Dr Jekyll, the famous scientist, is not all he seems, and the other side of his character – Mr Hyde – is, you will recall, a distinctly nasty piece of work.

Continuing the idea of the two sides of the human character, have a look at the picture above. On the left is Dr Angry, and on the right is Mr Calm.

Now, back away from your computer screen. This effect will work at different distances for different people, but you should see the two characters swap over…! As you come closer to the screen again, they revert to their original characters

This is based on work by Dr Aude Oliva (MIT) and Dr Philippe Schyns


Is there spiral on this Image? No, it’s actually just independent circles!



This is one of those illusions that just seems to move, even though it is in fact completely still.

This wonderful illusion was created by A.Kitaoka in 2004, who owns the copyright


Looks like someone has invented perpetual motion – these cogs are certainly never going to stop moving!

Mr. Shebzukhov from Moscow in Russia created this illusion in October 2004, and owns the copyright.

Scintillation Grid
try to count the black dots ———-(I found 16 black dots)
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!

The Amazing Dots

Watch the X in the middle very closely. You should start to see a green dot that rotates around the circle – this dot is an illusion; then 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,

(click on the image)

Focus on the dot in the center and move your head back and forth