Just like most parts of the human body, our eyes have a tendency to get worse with age. You might take your ability to focus for granted now, but that could change once you hit late middle age and beyond, leading you to seek a solution to your situational vision woes.

If you need different pairs of glasses for seeing different things or wear bifocals or progressive lenses, the future is looking bright: Someone has invented a pair of glasses with lenses that can adjust themselves on the fly. A team of computer and electrical engineers at the University of Utah has unveiled a device with lenses that can change focus depending on what the wearer is looking at.