Handheld Adaptive Optics Scanning Laser Ophthalmoscope (IMAGE) Optica Caption Researchers developed a handheld adaptive optics scanning laser ophthalmoscope that weighs about the same as a large mobile phone. It can be used to image individual photoreceptors in people. Credit Theodore DuBose, Duke University Usage Restrictions None 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.