You have no idea exactly how much damage the crewmember has sustained if any
Indeed, but
Given the difficulty in aiming a laser at an aircraft (even for the military this has proved insurmaountable so far), it is almost impossible for the beam to be held on your eyeball for long enough to do thermal damage to your retina
General consensus from throughout the thread is that it's very likely to be minimal, and temporary, from most of the lasers currently available and being used by yobs for this purpose.
Awaiting more views on this from others actually doing the job (I'm not ! ).