Ames trapezoid

English

Ames window

Etymology

Discovered by American ophthalmologist Adelbert Ames, Jr. in 1947.

Noun

Ames trapezoid (plural Ames trapezoids)

1. An optical illusion in which a trapezoid, subdivided into squares to look like a paned window, and made to rotate, appears to be a rectangle.

   Synonym: Ames window