Question: What do you do when your working with lasers?

Paul O'Mahoney answered on 8 Mar 2016:

In the past I have used lasers for moving around cells and very small particles. Have a look at Optical Tweezers and you will get an idea of how to move things with light!

Right now, we use them for diagnostics, so maybe finding where a tumour is, and for activating light sensitive drugs in tumours to kill them