When you look at this design, ghostly black dots appear in some of the intersections. They are not random, but always appear where you are not looking. They appear and disappear as you move your eyes over the image. If you let your eyes rest on one dot you can make it and the nearest dots fade ...

Welcome to the Exciting World of Optical Illusions   A massive collection featuring interactive live optical illusions, exhibits, artwork, games, puzzles! Free Tours! 100's of Original Exhibits. On the web since 1992.   Start exploring  The World's Most Amazing Optical Illusions Visit ...

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Impossible Objects Impossible objects are reasonable parts put together in un-reasonable ways. They may look okay at first, but taken as a whole they fail the most generous tests of geometry. They go beyond our perspective-loving comfort levels. Corners go off in wrong directions, and solid beams ...

or... Cognitive Psychology can be fun! Experience the Stroop! Take these three easy-to-do tests. They're fun and only take a few minutes. The results will give you a case of the Stroop, and a glimpse into the amazing world of human perception. To view this exhibit, you will need the free ...

Here are several project plans, and information sheets in PDF format (8.5 x 11).       Plans for a 3-dimensional, Ambiguous Illusion Cube.       Plans for a simple impossible triangle model.   ...

Playing Cards Y&B127 Optical Illusions & Visual Oddities Double Deck $15.00 Optical Illusions & Visual Oddities. Two new decks for 2004! Over 100 brand new, state-of-the-art illusions in this double pack containing both decks I and II of our newest playing ...

The term ambigram coined by Omni magazine, refers to certain words and designs that read the same upside down. Don't confuse them with Palindromes, which are words that read the same backwards; like Madam. Here is a decorative example by typeographer John Langdon, which spells the word ...

Moiré (more-ray) patterns happen when you move transparent patterns over one another. The top pattern in this example is transparent and moves in a steady circular motion over the motionless, bottom pattern. Click on the "A" button to reveal the bottom pattern. Click on the "B" to reveal the ...

Where is the Island? In autumn, cold air descends on warm water to create an inferior mirage. Lower parts of this island disappear while higher parts have a reflected counterpart in the inversion layer above. In this superior mirage of a boat there is one object, and several mirages. The first ...