With the rapid development of technology, not a small part of the population is forced to use such a thing as sunglasses. But they also bring no small trouble. After all, for that would consider the items near or on the contrary, in the distance - it is necessary to use an extra pair of glasses. To avoid all these hassles American university scientists in Utah, found an ingenious solution to this problem. Their invention - glasses with auto focus.

Their uniqueness lies in the fact that the person looking at the object in the distance, they are configured in such a way that people could see this thing. With objects close - all exactly the same. The secret is that instead of the usual lenses, was taken as the basis used is liquid lens. As they built and e-filling.
Thus, the owner will not feel discomfort using this technology.