[White Rabbit]

I check mine on a regular basis, I switch it on and look directly down the beam to see if it's coming out of the collimator straight, if it is then it's colimated. I've had to start using the other eye of late because I seem to be going a bit blind in my left eye, that was my good eye and the one I use to use for collimating my laser collimator. I should go to the doctors to get that seen to. I wonder what could be causing my blindness?

Ha, only kidding. Kids never do that at home everyone knows that lasers are for pointng a airoplanes and not your eyes.