Abstract: Provided herein is a glaucoma drainage implant assembly. The assembly may include a drainage implant tube defining a lumen there through defining a fluid channel between an anterior chamber of an eye and a region outside of the sclera of the eye; a closure disposed at a position outside the anterior chamber of the eye, the closure configured to preclude fluid flow from the anterior chamber of the eye to the region outside of the sclera of the eye; and a shunt received within the drainage implant tube, between the end of the drainage implant tube in the anterior chamber of the eye and the closure, where the shunt is configured to permit fluid flow from the anterior chamber of the eye, through the drainage implant tube, and out of the drainage implant tube external to the sclera of the eye through the shunt.