Roland Piquepaille writes, "Researchers in California are now using light to control biological nanomolecules and proteins. They think it can help them to develop treatments for eye diseases, such as the loss of the light detectors in the retina that is a major cause of blindness. They envision putting some of their nano-photoswitches in the cells of the retina, restoring light sensitivity in people with degenerative blindness such as macular degeneration. It will be a while before this technique emerges from the laboratory. ZDNet has additional references and pictures of what you can do with these photoswitches."