up parts of an LED array in the lenses so the wearer can see objects in more detail. Although this is only a prototype so far, the real thing could include optical character recognition for reading newspaper headlines. In this case the glasses are using cameras and software to interpret the world and essentially put zoomed in images on a screen in front of the wearer's eyes. Smart glasses build a soundscape of the world Meanwhile Spanish engineers have equipped a pair of sunglasses with two micro cameras and headphones in a system called EYE 21. The system makes a 3D model of the space the cameras see and represents it with sounds. A blind person can then hear the visual space around them and their brain reconstructs its shape. This method takes advantage of the way a person with normal hearing can 'place' a sound: near or far, left or right, front or behind. Smart glasses read expressions A scientist at the University of Cambridge , UK is using facial expression analysis to help people recognise the emotions of those they're talking to. A camera and software in a pair of glasses tracks 24 feature points on a face and matches expressions to a database. An earpiece advises the wearer of the findings, while a small light inside the lens provides quick alerts. Findings can also be displayed on a computer screen. In tests the 64% accuracy of the glasses beat out the 54% accuracy of humans. Now those