Disclosure

How OpticalIllusions.com is funded.

OpticalIllusions.com is free to use. To keep it that way, we earn money in three ways.

Advertising

Some pages show ads served by Google AdSense. Ads are clearly labelled and are not endorsements. We do not choose individual advertisers.

Our merchandise

Buttons such as “Get this on a tee” link to our own store, run with a print-on-demand partner that prints and ships each order. When you buy, we earn the difference between the retail price and the printing cost.

Partner links

Occasionally we may link to products or services through affiliate programs, which pay us a small commission at no extra cost to you. Such links are marked as sponsored. Commissions never influence our explanations of how illusions work.

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