glasses samples (IMAGE) Ural Federal University Caption Physicists engineered several samples of glasses. All of them clarity, but with different additive. Credit Image: UrFU / Anastasia Farafontova. Usage Restrictions Please credit the author of the image: UrFU / Anastasia Farafontova. 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.