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Description Presented here is a vast gallery of many different forms of Optical Illusions. Whether these optical illusions are conveyed through fractals, photographs, architecture, art, or old fashioned pen and ink, they are bound to remind you that "seeing is not believing."

Caution!!!! Some of the optical illusions on this blog may cause dizziness or possibly epileptic seizures. The latter happens when the brain can't handle the conflicting information from your two eyes. If you start feeling unwell when using this website, immediately cover one eye with your hand and then leave the page. Do not close your eyes because that can make the attack worse.
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Motion Induced Blindness

I found this on 52 Optical Illusions & Visual Phenomena, by Michael Bach his page has a wide array of interactive Flash illusions, very well done. Michael Bach refers to "Motion Induced Blindness" by Yoram Bonneh, Alexander Cooperman and Dov Sagi as the source for this illusion. They say the following about this illusion:

Motion Induced Blindness (MIB) is a phenomenon of "visual disappearance" in which salient visual stimuli disappear as if erased in front of the observers eyes. This demo demonstrates several properties of this phenomenon. It is implemented as a set of GIF animation and can only be appreciated if the apparent motion appears smooth or almost smooth. In general, fixate in the center or lower part of the screen without moving the eyes, pay attention to the moving pattern and observe what happens to the static yellow dots.
If all you can see is a red cross or a green puzzle piece, then you do not have flash player installed on your computer. To get flash player installed click here and download from macromedia.com

You can click on the ←/→ buttons to change speed.

Fixate on the center (watch the flashing green spot). Note that the yellow spots disappear once in a while: singly, in pairs or all three simultaneously. (Trust me, even though the spots seem to disappear, the yellow spots are there the entire time.)

On their site they have many variations of "motion induced blindness" in the form of animated GIFs. They also have a downloadable executable that has all of the variations in both a Windows or Linux format.


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