The Ames Room Illusion is an optical illusion that creates an optical illusion of a distorted room. It was first described by American ophthalmologist Adelbert Ames, Jr. in 1934. The illusion is created by placing two walls at an angle to each other, and then placing two
From Wikipedia
An Ames room is a distorted room that creates an optical illusion. Likely influenced by the writings of Hermann Helmholtz, American scientist Adelbert Ames Jr. invented the concept and patented it in 1940. The exact date of the invention has not been established: according to Behrens, "as early as 1934, Ames designed his first 'distorted room'"; other authors suggest 1946.