< previous | next >              Close window Blind spot demonstration #4: Repeat the experiment in blind-spot demonstration #3, "aiming" your blind spot at a pattern that resembles a swastika—an ancient Indo-European peace symbol. The lines are deliberately misaligned, one on either side of the blind spot. Many people find that when the central hatched disk disappears, the two vertical lines get "lined up," whereas the two horizontal lines do not line up—there is a slight bend or kink in the middle. © | Updated October 2001