Glossary: Optical tweezers (IMAGE) Kobe University Caption Optical tweezers are concentrated beams of laser light that can be used to trap and move microbeads. Credit Kazuya Tsujita, Kobe University. Usage Restrictions Please credit. 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.