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A glaucoma drainage implant is a type of medical shunt used to help lower your eye pressure. The shunt consists of two parts: a small tube and a plate. The small tube is inserted into your eye to let the fluid drain out. The plate is attached to the tube.What is eye shunt surgery?
Tube-shunt surgery involves placement of a flexible tube inside the eye that drains aqueous humor, the fluid inside the eye, to an external reservoir. The Ahmed valve is a type of tube-shunt that has a valve to regulate the amount of fluid drained from the eye.