Those affected by locked-in syndrome are effectively cut off from the outside world. They're paralyzed to the point where they can't move or speak -- in many cases, they might only have control over their eyes. Thankfully, technology might just use that remaining freedom to give these sufferers a voice. UC San Diego researchers are developing systems that use eye tracking for communication. One prototype, EyeHome, would have you navigating a phone-like interface by gazing at different parts of the screen. You'd look one way to dictate a message, or another to catch up on social networks. Other elements could include specialized e-book readers and even eye-guided musical instruments.