The blurred image on the left shows how a farsighted person would see a computer screen without corrective lenses. In the middle is how that same person would perceive the picture using a display that compensates for visual impairments. The picture on the right is a computer simulation of the best picture quality possible using the new prototype display. The images were taken by a DSLR camera set to simulate hyperopic vision. (Photo by Houang Stephane/flickr; modified by Fu-Chung Huang/UC Berkeley)