Eye Tricks

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moire Circles. (Not MORE circles, moire Circles!)

This is Interactive! Click and drag the circle screen. See explanation below.

This is a fun one to play with. A Moire effect (also known as a moire pattern) is the unique pattern that is created as you merge two screenlike objects together. Circles are especially fun to use for this effect. What you are supposed to do is click and drag the one screen of circles around the other screen. You'll notice a new pattern that is created by your eyes. You'll see white areas and gray areas, usually forming a symetrical pattern. This is because the eye and your brain wouldn't normally see something like this in nature, and your brain tries to characterize an area as either light or dark, and tries to make discernable patterns from it.

An addtional optical illusion you can try with this is to move the one circle in a circular pattern over the circle in the background. Just offset the circles about the width of the innermost circle. As you do this, you'll see the moire effect cause it to look like the circles are rotating, but of course they are not.

If you really like this illusion, be sure to let me know. If there's enough interest in this moire pattern, I'll create some additional moirescreens for you to play with.

Please rate this illusion/picture. Your ratings help us choose which new optical illusions to create:

Best of the Best ...

Most Popular for October 2009:

	Same Shade Diamonds Our newest optical illusion. We just created it on 10/10/2009 Wow! It will look like the diamonds on the top are much darker than the diamonds on the bottom. You won't believe how amazing this incredible optical illusion is.
	Moving Backgrounds Created 9/24/2009 It moves! You must zoom in to get the full illusion. You'll see the rings rotate, even though they are not moving at all. We've created several sizes so you can use as your desktop background.
	Scary Faces Illusion Created 9/17/2009 Watch as the scary faces disappear before your eyes. The longer you stare the stronger the illusion. Perfect to send to your friends for Halloween!
	The Obama Illusion We made this original Barack Obama Illusion and then we made it famous! Stare for about 30 seconds and you'll see his ghostly image appear on the wall!
	Valentines Day Love Test Illusion This is one of our most highly rated illusions by our visitors. Watch the hearts disappear before your very eyes! This is really cool. You'll start to see the hearts disappear as you fixate at the center. Don't miss it.
	Moving Spiral Illusion A version of our original moving spiral illusion was recently published in a popular college textbook. It uses multiple illusory principles to give the illusion that it is moving when it is absolutely not moving. Big enough to be your desktop background!
	Build Your Own Impossible Triangle Instructions so you can build your own impossible triangle. Tell M.C. Escher that it's not so impossible after all! Comes with a printable PDF guide with dotted lines for the folds and clearly marked lines to cut. See pictures of visitors submitted triangles too!

If you don't have time to see the hundreds of illusions today, see if you can at least catch all of these...

Cool Optical Illusions Blog - Don't miss it!
Love Test - Don't you just love optical illusions.
Blue Spiral Wallpaper - Love it!
Moving Spiral
Scary Illusion
Optical Illusion Collection
Inverted American Flag
Freaky Desktop Wallpaper
Floating 3d Cube Sculpture - HOT
Rotating Moving Spots - Very Strong.
Build your own impossible triangle - A classic, one of our most popular of all time.
Color Blindness Test - Better test yourself before it's too late, like it was for Dwayne in the movie Little Miss Sunshine!
Illusion Links
Jesus Illusion - Always fun, even if you've already seen it!