Quoted:so....uh, how quickly can you blind some one with a blue ray laser ?
In less than the blink of an eye. In a flash. Faster than you can react.
It would not totally blind you that quickly, but it would instantly spot burn your retina where the beam landed,
and where your retina gets burned, that shall be a black spot in your vision for the rest of your life.
The eye-safe limit for lasers is not much over 5 milliwatts. I once had a green 50 mW laser beam flash across one
eye, going by VERY quickly, and the spot I got in my vision lasted for half an hour at least. No permanent damage was
done, but it was a very near thing, I do believe.
What happens when you get a temporary spot in your vision from looking at a bright light source is that the photosensitive
chemicals in your retina, which are constantly being depleted by exposure to light, and replaced, get deeply depleted by
brighter lights, and it takes a while for the chemicals at that spot to be fully replenished.
If the spot in your vision doesn't go away in a day, it never will. At that point you have retinal burn damage and it's permanent.
That 50 mw laser could do that, if allowed to shine into your eye for more than a tiny fraction of a second. A 1 watt laser
would burn your retina in a fraction of a millisecond.
CJ