Optical tweezers clear blocked blood vessels

Blocked blood vessels could be cleared with light. Optical tweezers use a laser to grab tiny objects, holding them with weak forces arising from their interaction with the light. Yin-Mei Li and her team at the University of Science and Technology of China in Hefei moved blood cells around inside a capillary in the ear of a mouse with the tweezers, unpicking a blockage cell by cell.

Electronic violin turns laser signals into music - tech - 22 March 2013 - New Scientist

THE sound of a violin bow across strings can be exquisite. But bowing well is hard to master. Now that smooth grace is encapsulated in a new kind of electronic instrument. Developed by Dylan Menzies at De Montfort University in Leicester, UK, the O-Bow uses optical sensors to track the movement of a real violin bow across a groove in a metal instrument.