Wow! This will mess with your head!

The Ames window is a lesson in how our brains deceive us. This is an illusion that not only makes you doubt your eyes, but it can even cause doubts about reality, science, the universe as well as physics.

And the Ames Room?

In 1934, ophthalmologist Adelbert Ames, Jr. devised a room that pushes the boundaries of human perception.