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A foldable artificial lens with an integrated transponder system for measuring intraocular pressure

: Ullerich, S.; Mokwa, W.; Bögel, G. vom; Schnakenberg, U.

Obermeier, E.:
Transducers '01 / Eurosensors XV. Digest of technical papers : The 11th International Conference on Solid-State Sensors and Actuators
Berlin: Springer, 2001
ISBN: 3-540-42150-5
pp.1224-1227 : Lit.
International Conference on Solid-State Sensors and Actuators <11, 2001, München>
Eurosensors <15, 2001, München>
Conference Paper
Fraunhofer IMS ()
Drucksensor; transponder; Augeninnendruckmessung; Telemetrie

A miniaturised and foldable transponder system consisting of a chip and a micro coil for measuring intraocular pressure continously is presented. Investigations for design optimisation of the micro coil and of the influence of the eye movement with respect to the received DC voltage were carried out. Measurements show good agreement between calculated and measured values. A 22 µm thick coil with an outer diameter of 10.3 mm, an inner diameter of 7.7 mm, 16 turns and a gap of 20 µm between the windings was selected for wirelss pressure measurements showing a linear behavior of the output signal with respect to the apllied pressure.