장철인 신경식 윤광석 김용우 강지윤 이수현 2024-01-20T08:32:20Z 2024-01-20T08:32:20Z 2021-09-06 2014-11 1225-5475 https://pubs.kist.re.kr/handle/201004/126158 We had presented an inductive type intraocular pressure sensor (L-sensor) in previous work. The distance between a micro coil and a ferrite on the membrane was modulated by pressure, and as a result the inductance and resonant frequency were changed. However, L-sensor has some problems to implant in eyes. First problem is low sensitivity. When L-sensor was implanted in rabbit’ eyes, resonant frequency of L-sensor was very hard to detect. Second problem is biocompatibility. Size of L-sensor is 6×7×1.2mm. When L-sensor was implanted in the eyes, it caused the inflammation. Therefore, this study suggests an inductive and capacitive type IOP sensor (LCsensor). The sensitivity of the LC-sensor 27.3 kHz/mmHg under 60mmHg. It is much larger than 14 kHz/mmHg of the L-sensor. And the size of LC-sensor is 47% smaller than L-sensor. After 2 weeks from the implantation of LC-sensor into rabbit eyes, we measured the changes of resonant frequency of LC-sensor according to increased IOP by Balanced Salt Solution (BSS) injection. As a result, the sensitivity of LC-sensor in in vivo test is 25 kHz/mmHg. That is similar to the sensitivity of in vitro test. Korean 한국센서학회 민감도 향상과 센서 소형화를 위한 자기 및 용량형 안압센서의 개발 Development of Inductive and Capacitive Type Intraocular Pressure (IOP) Sensor to Improve Sensitivity and Minimize Size Article 10.5369/JSST.2014.23.6.409 2 센서학회지, v.23, no.6, pp.409 - 415 센서학회지 23 6 409 415 kci ART001932910 Glaucoma Intraocular pressure (IOP) IOP sensor in vivo Wireless Implantable