Wireless intra-ocular pressure monitoring system integrated into an artificial lens

Reports the concept and first results of a hybrid integrated telemetric pressure measuring system for continuous monitoring of the intra-ocular pressure. The system is designed for glaucoma differential diagnosis and follow up. The measuring system is highly miniaturized using advanced flip-chip mounting technology to fulfil the spatial requirements of integration into the fringe of an intra-ocular lens without the necessity of a monolithically integrated sensor. The surface micro-machined pressure sensor is used in an integrated hybrid circuit comprising the sensor itself and a dedicated read-out circuit in standard CMOS technology. First experimental results of the system are presented. The concept of the telemetric data transmission, mounting and assembly, the coating and EMC problem is discussed briefly