Had a green lazer shone into my flight deck a few nights ago, at night ,on final approach at 1000ft. It completely blinds you and impedes night vision for several seconds after.Of course you dont look at it, but trying to get a fix on its location to inform atc, its like trying not to look at the sun. When you have 300 lives behind you, depending on you to land them safely, this is no joke, the book should be throw as hard as possible at whoever thinks its fun to do this.