Selective Laser Trabeculoplasty (SLT) is a type of laser surgery that uses a combination of frequencies allowing the laser to work at very low levels. It treats specific cells “selectively” and leaves untreated portions of the trabecular meshwork intact. For this reason, it is believed that SLT, unlike other types of laser surgery, may be safely repeated many times. SLT may also be an alternative for those who have been treated unsuccessfully with traditional laser surgery or with pressure lowering eye drops.