How Optical Illusions Trick Your Brain

Optical illusions are great because they make you question everything you see...or think you see.

Optical illusions are images that seem to trick our minds into seeing something that isn't actually there. But how do they work and what can we learn by knowing how they work? Well, for one thing, we can begin to appreciate how our perceptions of the world are colored by many factors, one of which is the presumptions that our brain makes for us in an effort to be efficient.

Source