A system for implantation in an eye of a patient includes a flow device sized for implantation into the eye of the patient. The flow device includes a fluid flow passageway and a flow system. The flow system may include a regulator having a magnetic element, and may be displaceable in the fluid flow passageway to affect flow through the fluid flow passageway. The system may also include a control device physically separate from the flow device and configured to be disposed outside the eye, the control device comprising an actuator magnetic field generator configured to act on the magnetic element to adjust the regulator in the flow system to selectively adjust flow through the flow device in response to changes in intraocular pressure.