Goggles that use computer wizardry and augmented reality to trick human senses and make the wearer feel more satisfied with smaller or less appealing snacks. The diet glasses use built-in cameras to send captured images to an embedded computer, which magnifies the apparent size of the object such as a cookie and displays the enlarged image to the wearer while keeping the person's hand the same size, making the snack appear larger than it actually is.

In experiments, volunteers consumed nearly 10 percent less when the biscuits they were eating appeared 50 percent bigger. On the other hand, test participants ate 15 percent more when cookies were manipulated to look two-thirds of their real size.