Punishment is way over-exaggerated. Green lasers were used in Iraq all the time. While it served a purpose, even Iraqi drivers didn't veer wildly. Another big problem we were having is that stupid Soldiers would laze each other in convoys. Some of these vehicles are seriously top heavy, clumsy, and easily tip over. Yeah, it's not good to get lazed, but don't recall drivers wildly veering because of a green laser. This case in question is absurd.
Green lasers are dangerous for the human eye. However, not all cases end up with permanent sight loss. Many do recover. I have a hard time believing that a handheld laser could be kept in constant location (in the pilot's eye) for more than a very brief moment. It's hard enough with one moving vehicle, let alone an aircraft and a moving vehicle.
Yeah, get the guy. Make an example out of him. But 15 months in prison? I think a 1 month prison sentence and a $3,000 fine to pay for his incarceration is more appropriate. I do not feel sorry for criminals one bit. But this guy isn't a criminal. He made a stupid mistake that could have burned an eye out. If the pilot and co-pilot crash because of one quick laser flash, then they have no business being pilots.