Lensless fluorometer (IMAGE) Optica Caption Researchers developed a fluorescence detection system (right) that can provide highly sensitive detection of deadly microorganisms in drinking water, without using any lenses. They are now converting the technology into a lensless dip-in handheld system (left) that could be useful for testing water quality in the traditional natural stone spouts widely used by people in Kathmandu Valley in Nepal (background). Credit Rijan Maharjan, Ashim Dhakal, Phutung Research Institute Usage Restrictions None License Original 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.