Top: Kids and Teens: School Time: Science: Physics: Light and Optics: Optical Illusions (20)
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Eyetricks.com - Collection of illusions and other mind teasing oddities. Includes illusions that you can make.

Akiyoshi's Illusion Pages - Includes anomalous motion illusions.

The Exploratorium's Online Exhibits: Seeing Exhibits - Interactive illusions from the exploratorium.

Colorcube - Illusions organized by category, including blind spot, blink effect, bordering, chromatic adaptation, colorblindness, and others.

Visual Phenomena and Optical Illusions - Interactive illusions, including Benham's disk and other illusions involving motion.

Magic Eye Image of the Week - Includes a new image every week demonstrating stereograms.

Sandlot Science - Interactive optical illusions, games, science projects, fun puzzles, and distortions.

Illusion Works - A multimedia museum of optical and sensory illusions, with on-line demonstrations and explanations.

Khushboo's Virtual Escher Gallery - Small selection of images by the artist.

M.C. Escher - Optical illusion art, news, history, copyright and foundation information.

Counter-Rotating Spirals Illusion - Java applet, including other illusions, such as an animated Necker cube.

Optical Illusions and Tricks - Misleading graphics and diagrams.

Gallery of Optical Illusions - A collection of illusions by an eighth grade class at Kent Middle School.

Optical Illusions - From the Department of Opthamology and Visual Science at the University of Illinois, a collection of illusions and after images.

NIEHS Kids Page -- Optical Illusions - Presented by the National Institute of Environmental Health Sciences. A collection of illusions.

Eye Magic - Collection of high quality optical illusions that come with clear explanations.

Eluzions' Optical Illusions - Contains many optical illusions, illustrating a wide range of visual anomalies and surprising optical effects. A free screensaver, posters, and educational explanations are also provided.

Optical Illusions - Some classic optical illusions with explanations for how they work.

Crazy Images - Interactive animations and optical illusions that respond to user's input.

Eyetricks.com: Optical Illusions - Collection of optical illusions, brain teasers and games.