This study aims to evaluate if there is a difference between 180 degree nasal and temporal selective laser trabeculoplasty (SLT) in treatment outcomes. It is known that there is increased aqueous collectors and veins and thus aqueous drainage in the nasal quadrants of the eye. If SLT works by the hypothesized biologic mechanism in which macrophages remodel the aqueous drainage system to increase outflow, performing SLT in an area concentrated with aqueous veins may increase outflow more. As a result, we hypothesize that nasal 180 degree SLT may have better outcomes compared to the temporal counterpart. The results of this study may help inform decisions when performing 180 degree SLT and provide insight to SLT's mechanism of action. The primary objective of this study is to determine if there is a difference in treatment efficacy between nasal and temporal 180 degree SLT by measuring differences in baseline and post-operative intraocular pressures. We hypothesize that nasal SLT will have superior outcomes compared to temporal SLT due to increased number of aqueous veins.
