Narrow Angle Glaucoma: What should I do?

I've been told by my internist that I need laser surgery for narrow angle glaucoma/plateau iris.  He indicated that there both conservative and more aggressive approaches. He explained that there is a more conservative procedure putting one hole in the iris, which has a 50% chance of success. If it is not successful, they you would have to go again and they would do a procedure putting in a lot of holes. That sounds very scarey. I would appreciate any feedback about these procedures. I would also appreciate any referrals to Glaucoma surgeons in the New York area who take insurance.