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Posted on August 20, 2009 by noncon
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Triple-Spiral-Labyrinth-animated

Sea-Sickness

Which of the animated gifs above do you like best?

I like the spirals best. Actually, that is the only right answer. Not because I insist you agree with me, but because it is the only animated gif * out of the two. The other is a still image. What? You think it’s moving? Had a little drink, have we?

The optical illusion works by using specific colors with black edges and white edges in relation to each other, and is known as anomalous motion illusion.

Still don’t believe me? OK, look right in the center. It should stop moving. It didn’t with me because I can’t keep my dyslexic eyes still, but it did slow it down a lot! So now you might be able to stagger home without falling.

* prounced GIF,  not JIF – (that drives me crazy!)  – It’s short for Graphics Interchange Format. You wouldn’t say “Giraffics Interchange Format”, would you?  OK, maybe you would.

First image Triple Spiral Labyrinth (animated) by AnonMoos
Second image: Sea Sickness; an anomalous motion illusion by Walter Anthony

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