Glaucoma is the most common optic neuropathy of adulthood. When conservative options including drops and/or lasers are not sufficient, surgery is needed. One surgical option to lower intraocular pressure (IOP) is the use of glaucoma drainage devices to allow secondary outflow through an artificial drainage system [1]. These implants shunt aqueous humor from the anterior chamber and can be valved on nonvalved [2]. Non-valved devices must be regulated to prevent free flow of aqueous fluid during the early postoperative period while a fibrous capsule is forming around the implant Case Series
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