url: http://www.archimedes-lab.org/index_optical.html
title: Optical Illusions
description: Optical Illusions and visual phenomena that challenge perception and perplex the mind
url: http://www.exploratorium.edu/exhibits/f_exhibits.html
title: Page 2
description:
url: http://www.questacon.edu.au/illusions/
title: Incredible Illusions
description:
url: http://www.getty.edu/art/exhibitions/devices/choice.html
title: Devices of Wonder (Getty Exhibitions)
description:
url: http://www.focuseducation.com.au/CoolStuff/coolstuff.html
title: Cool Stuff
description:
url: http://illusionsetc.blogspot.com/2004/02/optical-illusions-trippy-posters.html
title: Optical Illusions Etc...: Optical Illusions & Trippy Posters
description:
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