Researchers develop devices that trick the wearer into thinking a plain snack is more appealing or a small snack is bigger.

Researchers from the University of Tokyo in Japan have developed glasses that make snacks look more appealing, which could be helpful for people on a diet. Led by Professor Michitaka Hirose, the team created devices that use cameras and augmented reality to fool the wearer into believing the plain snack they are holding is something tastier or that a small biscuit is much larger.

Discovery News reports that cameras mounted on the glasses send images to a computer, which magnifies the apparent size of the snack in the image it shows the wearer while keeping their hand the same size. During a study of 12 men and women aged 20-30, participants who wore the glasses reportedly ate 9.3 % less  than those who didn't wear them.

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