This is how optical illusions work

We know the mind can be tricked by an optical illusion, but most people don't know why that happens.

This video from Inside Science explains just what goes on inside the brain when, for example, a person looks at the dress.

In essence, what you see isn't what you get because the brain takes shortcuts to process information.

"When you look at something, what you’re really seeing is the light that bounced off of it and entered your eye, which converts the light into electrical impulses that your brain can turn into an image you can use," the video explains. "The process that takes about a tenth of a second but your eyes receive a constant stream of light, an incredible amount of information, so it’s really difficult for your brain to try to focus on everything at once. It would be like trying to take a sip of water from a firehose."

To find out more, watch the video below

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