A laser is used to reopen the natural drainage passageways in the eye or to form new passageways to enable the drainage of the aqueous humor from the eye. In one procedure, an Er:YAG laser is used to ablate occluding tissue in Schlemm's canal. In another procedure, the Er:YAG laser is used to open occluded...http://www.google.se/patents/US5865831?utm_source=gb-gplus-sharePatent US5865831 - Laser surgical procedures for treatment of glaucoma
