An IOP control system for treatment of an ocular condition includes a drainage device sized for implantation into the eye of the patient, the drainage device including a fluid flow pathway to allow the flow of fluid from an inlet port to an outlet port. The drainage device also includes a flow system disposed within the drainage device and including a displaceable portion forming a part of the fluid flow pathway, the displaceable portion being displaceable via a magnetic field. An actuation system may be physically separate from the drainage device and may be configured to cooperate with the displaceable portion to displace the displaceable portion via the magnetic field to set free buildup or debris in the flow pathway.
