Patent ID: 8579848

Claim:
An IOP control system for implantation in an eye of a patient, comprising: a drainage tube configured to convey aqueous humor from an anterior chamber of the eye; a pressure-driven valve system in fluid communication with the drainage tube, the valve system actuatable in response to pressure differentials acting on the pressure-driven valves and configured to control flow rates of the aqueous humor, the pressure-driven valve system comprising a first pressure-driven valve and a second pressure-driven valve arranged in series to operate independently of each other; wherein the pressure-driven valves control flow rates of the aqueous humor along the drainage tube by shifting in response to pressure differentials between the anterior chamber of the eye, the drainage site, and the atmospheric pressure; and further wherein the pressure-driven valves each include an S-shaped flow control member; and an electrically-driven pump system in fluid communication with the drainage tube and the pressure-driven valve system, the electrically-driven pump system being arranged to selectively control aqueous humor flow rates through the drainage tube and influence the pressure differentials affecting the valve system.