Perhaps it's because I love to draw, but I find this weird mechanical contraption absolutely fascinating. It allows anyone to draw in perfect perspective, matching the field of human vision.
Invented by artists Ryan and Trevor Oakes, Vision uses a technique "which splits the ocular system allowing them to create views that match the field of view of human vision." The result is an easy way to draw a scene with total accuracy, in which every point in the paper is at the same distance from the artist.
For anyone screaming "trickster!" well, yes, it's a trick -- a very clever one. Old masters also used different machines, like the camera obscura, to capture scenes in a really accurate way. [OakesOakes via This Is Colossal]