A Japanese study used computer technology to create some special goggles that either make food look bigger or smaller.

Professor Michitaka Hirose and his team believed that, by making food look larger, people will want to use less. His study backed this up, finding that participants at 10% less when the cookies they ate appeared 50% bigger (that’s one big oreo!). Conversely they ate 15% more when the cookie was 2/3 of its real size.

As yet the team have no plans to commercialise the idea. See a report here. Any ideas about how the idea could be put into practice without fancy googles?