Optical Illusions in the Yahoo! Directory

SandlotScience.com
An online collection of colorful optical illusions without a lot of 'deep' science. Includes many interactive demonstrations, science projects, art, books, games, puzzles and more.
www.SandlotScience.com
Akiyoshi's Illusion Pages
Collection of dizzying anomalous motion illusions by Akiyoshi Kitaoka.
www.ritsumei.ac.jp/~akitaoka/index-e.html
Grand Illusions
Offers optical illusions, scientific toys, visual effects, and feature articles.
www.grand-illusions.com
Eyetricks
Optical illusions and other mind teasing oddities.
www.eyetricks.com
OpticalIllusions.com
Gallery of optical tricks and illusions.
www.optillusions.com
Cool Optical Illusions
Browse a large gallery of optical illusion pictures, fun eye tricks, impossible puzzles, and ambigrams. Includes incredible perceptual motion illusions, stereograms, amazing hidden images, and some very funny pictures.
www.coolopticalillusions.com
Counter-Rotating Spirals Illusion
dogfeathers.com/java/spirals.html
Mark Newbold's Animated Necker Cube
Applet forcing the viewer periodically switch their perception of a cube.
dogfeathers.com/java/necker.html
Planet Perplex
Categorized collection of optical illusions, ambiguous images, impossible objects, puzzles, and hidden images. Also includes related glossary and links. Site in English and Dutch.
www.planetperplex.com
Rotational Illusion
Examples of pictures that convince the viewer that the objects they're observing are actually rotating.
www.ritsumei.ac.jp/~akitaoka/rotate-e.html
Optical Illusions and Visual Phenomena
46 illusions (with explanations) compiled by Michael Bach.
www.michaelbach.de/ot
Joy of Visual Perception: A Web Book
foxglove.ccs.yorku.ca/research/vision/eye
Amazing Optical Illusions
Gallery of classic optical illusions.
www.angelfire.com/weird2/opticalillusions
Visual Illusions
Offers interactive examples of physical, physiological, and cognitive illusions and explains why the eye perceives them as it does. Experiments include color contrasts, spatial relationships, and peripheral drift illusions.
psicol93.uab.es/ilusions
Jack and Beverly's Optical Toy Collection
Collection of antique tools for creating optical illusions, such as zoetropes, flip books, and magic lanterns.
www.brightbytes.com/collection/toys.html
Pulfrich Effect, The
Offers an explanation of the motion-induced illusion of depth.
www.siu.edu/pulfrich
Mighty Optical Illusions
Community blog dedicated to visual phenomena and real life illusions.
www.moillusions.com
Break.com: Optical Illusions
Features videos of optical illusions, magic tricks, and amazing card tricks.
www.break.com/a/illusion/optical-illusions.html