Effective November 1, 2026.
Learning, not medical advice. The explanations describe how vision research understands each illusion. Nothing here is an eye test or medical advice. If you notice a real change in your vision, see an eye doctor.
Sharing. Share cards and screenshots of the illusions may be posted with a link back to the page. Teachers may show the site in class. Please do not copy the illusion code or the written explanations to another site.
Motion illusions. A few illusions use moving or flickering patterns. Stop if you feel discomfort, and take care if you are sensitive to flashing images.
Accuracy. We cite our sources and check them, but we make no warranty that every detail is complete or current.
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Liability. To the extent the law permits, we are not liable for any loss from using the site.
Updates. These terms can change; the date at the top tells you which version applies. Contact: hello@illusionsblog.com.