I found this article on Yahoo and I thought it was very interesting. It has 8 pictures that are very "Cross-Eying", but give off a cool effect. One makes the object look like it is pulsing when you stare at it. The photo on this post is one of them at this website:
This is part of the article from the web address posted above, describing how it works:
If you’ve ever felt like you go a little cross-eyed after taking a peek at an optical illusion, then you know they can be a pretty intense phenomenon. What your eyes perceive when looking at one of these images is actually a visual illusion; you see the image as something different than what it is because the different cells and receptors in your eyes distinguish images and colors at dissimilar speeds. The eye can only receive a limited amount of visual stimuli, but as your brain constantly processes the visual information, it gives you the illusion of continuous sight. Whether it’s an optical, physiological or cognitive illusion, the design plays a trick on your eyes (and mind). Check out some of the interesting illusions below—but beware, you may not be able to absorb them all in one sitting.
I used to have some magazine pics of them my mother sent me. I've lost them now. I'll try online, see if I can find them. The trouble is I don't know what they are called, so it's going to be hard to search.
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