The Lumenis Selecta II is a clip-on product, conveniently fitting onto most commercially available converging-optics style slit lamps. The unique design of the unit’s laser head makes for especially easy system attachment and disconnect allowing physicians to use the slit lamp as a diagnostic tool, an advanced laser delivery device or both. Lumenis SLT technology uses a Q-switched, frequency-doubled Nd: YAG; 532 nm wavelength green laser. When applied to the target tissue, the laser is selectively absorbed by melanin-containing pigmented cells in the Trabecular Meshwork, without causing thermal or coagulative collateral damage to adjacent tissue. The increase in expression of biological cytokines and cellular mediator activities following laser irradiation recruit macrophages to the Trabecular Meshwork. In turn, macrophages remove obstructive proteins and remodel the Trabecular Meshwork, improving aqueous humor outflow and, thereby, reducing intraocular pressure (IOP).