Terms of Use

By using Optical Wonderful (opticalwonderful.com), you agree to the terms below. If you don't agree, please don't use the site.

The content on this site

All original text, illustrations, and interactive demos on this site are the property of Optical Wonderful unless otherwise credited, and are provided for personal, non-commercial, educational use. You're welcome to link to any page on this site. Reproducing substantial portions of our written explanations elsewhere without permission or attribution isn't permitted - if you'd like to quote, excerpt, or republish something, reach out via the Contact page first.

Where a page describes an illusion, artwork, or technique created by someone else - a photograph, a piece of fine art, a named effect - credit is given to the original creator or discoverer to the best of our research; see the Editorial & Sourcing Policy for how that research and attribution process works.

Acceptable use

Don't use this site to:

• Attempt to disrupt, overload, or gain unauthorized access to the site or its underlying systems
• Scrape or bulk-copy content for republication elsewhere without permission
• Use any interactive demo in a way that's abusive, deceptive, or designed to harm another visitor

No professional advice

Content about visual perception, cognitive science, or photosensitivity (see the Illusion Safety page) is provided for general educational interest and is not medical, clinical, or professional advice. If you have a photosensitive epilepsy diagnosis or another condition that could be affected by high-contrast or flickering visual patterns, consult a qualified medical professional rather than relying on this site's descriptions alone.

Third-party links and advertising

This site may link to external sources for further reading, and may display advertising served by Google AdSense and its partners. We don't control the content of external sites or individual ads, and linking to or displaying an ad doesn't imply endorsement. See the Privacy Policy for how advertising cookies work on this site.

Disclaimer and limitation of liability

This site is provided "as is," without warranties of any kind, express or implied. While we make a genuine effort to keep illusion explanations, historical attributions, and scientific claims accurate (see the Editorial & Sourcing Policy), perception science is an active research field and some explanations described as "leading" or "commonly accepted" may be revised as research develops. We're not liable for any loss or damage arising from your use of, or reliance on, this site's content, to the fullest extent permitted by law.

Changes to these terms

We may update these terms from time to time; the "last updated" date above reflects the most recent revision. Continued use of the site after a change constitutes acceptance of the updated terms.

Contact

Questions about these terms can be sent to [email protected], or via the Contact page.