Laser Surgery

I wonder if anyone has experience with this laser surgery for glaucoma. My IOP's range fropm 12 to 17. I have been getting a great deal of vision loss at this range. I guess the laser would lower it even more??? How low can it go? This is really sort of scary as I though my pressures were low. Ususally they are 12 to 15. I did check with one of the chain vision places about refular and frequent checks and they said they dont do that unless you are actively using their services. I guess this means 'full service.' If anyone knows about this laser stuff it would be great to hear. Thanks