Observed arrival · 2026-10-28
OpticalIllusions.com: Your eyes are lying, beautifully
A collection of 41 optical illusions with explanations, interactive demonstrations, a quiz, and printable classroom materials.
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- For
- Illusion-curious readers, kids, and classroom teachers
- Worth noticing
- A 30-second spiral exercise can make stationary things seem to move after you stop watching it.
Field notes
The homepage groups illusions by motion, geometry, brightness, colour, and impossible figures, then surfaces examples such as the Café Wall and Checkerboard Shadow. Many entries are labeled interactive; the site also offers an eight-question quiz alongside its longer test. Its classroom pack is described as including DIY projects and teaching tips. The homepage says the 41 illusions are drawn from scratch and paired with explanations of their science and history.
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One card from the complete issue