'Smart' Sunglasses (IMAGE) American Chemical Society Caption Lenses of "smart" sunglasses can change color on demand. To view video, go to http://chemistry.org/chicagonews/images.html. Credit (Courtesy of University of Washington and Chunye Xu) Usage Restrictions None 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.