Patient (IMAGE) MediaSource Caption Jason Esterhuizen, who lost his vision in a car accident, practices finding objects with his wife, Sumarie. A video camera on his glasses signals an experimental device in his brain, enabling him to distinguish light from dark. Credit UCLA Health Usage Restrictions All multimedia is available for free and unrestricted media use with courtesy to UCLA Health. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.