ATIENTS WITH OPEN-ANGLE GLAUCOMA (OAG) would benefit from the safest, most effective approach to preserve their visual function while maximizing their quality of life. Certainly we owe it to our patients to find the best approach to manage glaucoma using evidence-based medicine. The Collaborative Initial Glaucoma Treatment Study (CIGTS) is a randomized clinical trial that tests whether filtration surgery or medical therapy is the best initial step to treat newly diagnosed OAG. Before this study, there were claims that immediate surgery was superior to medical therapy for patients with newly diagnosed OAG (see the study by Musch et al 1 for a list of references). These studies indicated that a surgery-first approach to glaucoma was associated with lower intraocular pressure (IOP), more favorable visual field outcomes, and lower costs than a medicine-first approach. Furthermore, other studies indicated that long-term medical therapy disrupted the integrity of the ocular surface, potentially jeopardizing the success of filtration surgery should it be required if medical therapy failed. Subsequent advances in medical therapy on the one hand and the widespread use of antimetabolites during glaucoma filtration surgery on the other only added complexity to the "incise" vs "instill" debate.