A first tube (3) and second tube (7) for guiding aqueous humor to the
exterior of the eye are connected to each other in the vicinity of a
surface of conjunctiva (14) via a first joint (5) and second joint (6). A
filter part (9) provided to prevent reflux infection from the exterior to
interior of the eye is connected to the second tube (7) via a third tube
(8) positioned inside a lower lacrimal canaliculus (23). This enables an
aqueous humor drainage implant (1) to be positioned in the eye and the
exterior of the conjunctiva with reduced invasiveness. With the aqueous
humor drainage implant for glaucoma treatment, the aqueous humor in the
eye can be drained to the exterior of the conjunctiva while preventing
reflux infection at the viral level, and the intraocular pressure
reducing effect can be sustained for extended time periods over the
lifespan of the patient. Further, the aqueous humor drainage implant can
be readily positioned with reduced surgical invasiveness, while posing no
danger of damaging the eye or nasolacrimal duct after the installation.