Who you gonna believe? Me, or your lying eyes?

 

What if I told you the two tabletops above have identical shapes and sizes?

They're Shepard tables, also known as the Shepard tabletop illusion, an optical illusion first published in 1990 as "Turning the Tables," by Stanford psychologist Roger N. Shepard in his book "Mind Sights," a collection of illusions he had created.

It is one of the most powerful optical illusions, typically creating length miscalculations of 20-25%.