Trio System features 3 lasers in 1. The trio system is a Deux SLT/Yag combo with an integraged Lightlas 532 Green Laser attachement. Features include: SLT: Used primarily for glaucoma treatment, the SLT procedure delivers short pulses of low engery light to help trigger the body to heal naturally. This procedure is often used as a first round of treatment for glaucoma patients or to complement other treatments. The procedures reduces IOP to preserve nerve function and has no side effects. YAG: Used primarily to treat cataracts, laser capsulotomy is used by ophthalmologists worldwide. The LightMed photodisrupters are the global leader, supplying nearly half of the global market with the Lightlas YAG. 532: These photocoagulators are used for the treatment of AMD and other retinal diseases.