During eye surgery, techniques to flush the cavities of the eye are hindered by the need to apply a tonometer and then manually adjust the flow to maintain proper pressure. Moreover, devices that continuously monitor intra-ocular pressure (IOP) often deliver erroneous values due to the sensor's distance from the eye. The mounting of a sensor closer to the eye entails mechanical problems due to the micro-miniature (that is several millimeters) size of the sensing probe and the fluid delivery system and the need to minimize surgical trauma.