Abstract: A glaucoma drainage device implant foldable and rollable upon itself for the drainage of aqueous humor in the treatment of glaucoma comprising an episcleral plate having both an upper surface and a lower surface and a drainage tube having one end terminating above the upper surface of the episcleral plate whereby the glaucoma drainage device may be delivered to the implant site through the lumen of a needle or cannula. The glaucoma drainage device implant may further comprise retainers for maintaining the implant in the proper operable position; a terminal collar for retention purposes; and a peripheral rim, inflatable in some embodiments, for improved filtration.