Design and Analysis of Wireless Passive LC Sensor Prototypes for Intraocular Pressure Monitoring

Some eye diseases require round-the-clock intraocular pressure (IOP) monitoring, for example, glaucoma. In this paper, we propose sensor prototypes with an LC resonance structure for wireless passive IOP monitoring. The LC sensor will be expected to be combined with contact lenses, so the sensor shape is designed as a circular ring structure. The performance of two LC sensor prototypes made using a flexible printed circuit board was simulated and measured. The resonance frequency of the LC sensor with a two-turn spiral inductor is 89.0 MHz and that with a three-turn spiral inductor is 46.5 MHz.