There are twelve black dots at the intersections in this image ... An Extinction Illusion talks about a similar set of optical illusions. The paper's abstract explains the phenomenon thusly ...

Have you ever wondered what the black dots around your car windscreen ... which causes straight lines to appeared curved. The optical illusion would distort vision for drivers, so frits are ...

Brain teasers come in many forms—some test mathematical skills, some focus on age-related puzzles, and others simply leave ...

In fact, some say this optical illusion can let you know straight ... a sheet of white dots moves one direction while a sheet of black dots moves in the other direction. For a majority of people ...

From eye-boggling images to logic-defying illusions that play with the subconscious mind, we’ve gathered five famous optical illusions ... dots against a gray background, with a black cross ...