Laser 'Needle' (image) The Optical Society Share Print E-Mail Caption This shows the beam entrance view of the laser injector. Credit Image courtesy Jack Yoh/Seoul National University. Usage Restrictions None Share Print E-Mail 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.