[From Wikipedia] “The Poggendorff Illusion is a geometrical-optical illusion that involves the misperception of the position of one segment of a transverse line that has been interrupted by the contour of an intervening structure (here a rectangle).” It’s named after its discoverer, Poggendorff.
Finding the brain’s faults is always exciting, and I’m sure there’s some way this could be incorporated into the mise-en-scene…