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  • eChalk colour perception: This is the most amazing optical effect in the world

    An illustration of three of the color illusions I have seen at other sites, done with great use of Flash -- you can drag around masks and color bars to demonstate to yourself over and over again that what you are being told is true. And you do have to demonstrate it to yourself over and over --... more

    Reviewed by Anitra Jul 29 2005, 11:54am ( 361 reviews ) echalk.co.uk

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