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Free Brain Illusions

These free online brain optical illusions will demonstrate how the eye deceives the mind when processing visual information. No tricks, no sleight of hand, just illusions. As such, many people will see these illusions differently or, depending on their colour vision, not at all, or in a limited form. This is best ilustrated in our train illusion below, going in or out of the tunnel? What do you see? Make sure to check out the second page as well. After you watch these brain visual illusions why not check out our other free online visual illusions, we've collected the best of the net.

 
 
 
 
 
 
 
 
 
 



Brain Illusions 6

Is the train going into or coming out of the tunnel. Seems obvious? Look again. Not so obvious now is it?



Brain Illusions 1


This is one of our favourite brain illusions. The hearts are rotating clockwise, but can you make them rotate anti-clockwise simply by staring at them?



Brain Illusions 2

Look at the rotating dots and you will only see a pink dot disappearing in motion. Now concentrate on the black plus sign in the centre. Gradually you will see that the moving dot turns green and magically disappears. One of our best brain illusions.



Optical Illusions 3


In this optical illusion what is changing size, the cigarette or the grid it is rolling across? Or maybe neither?



Brain Illusions 4

Try and count the number of black dots in the optical illusion above. Impossible?


Brain Illusions 5


In one of our most intruiging brain illusions, which of the two blocks is moving faster; the yellow or blue one? (Actually they are moving at exactly the same speed, but what does your brain see?)