A method for controlling intraocular eye pressure via fluid exchange in the body is presented. The method may comprise providing a system to sense and regulate pressure, then implanting the system into the eye. The system may comprise four main components: a cannula, a sensor, a controller and a pump. The method works to engage in a fluid exchange which slowly increases/decreases intraocular pressure until a desired level is reached. Once the desired level is reached, the intraocular pressure is held steady and any external pressure perturbations are removed.