Drainage surgery to control intraocular pressure (IOP) with different devices has limited success because of a buildup of extracellular matrix.^1,2 The initial devices used to drain aqueous were horsehair threads.³ Other materials including glass rods,⁴ gold,⁵ silk,⁶ and even artificial trabecular meshworks^7,8 were tried without success because of subconjunctival scarring. New devices including the Ex-PRESS glaucoma implant⁹ and Wilcox shunt¹⁰ are described in the literature; however, long-term effectiveness data are not available.