Measuring Glucose without Needle Pricks (IMAGE) Fraunhofer-Gesellschaft Caption With this nano-sized biosensor, diabetes patients can measure their glucose levels with the fluid from the tears of their eyes. Credit © Fraunhofer IMS Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. 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.