24-hour continuous monitoring of intraocular pressure (IOP) is beneficial for the care of glaucoma. Contact lens sensors using LC technology can achieve non-invasive all-weather continuous IOP measurement, and the principle and structure are relatively simple, thus occupying a mainstream position. Among them, the stretchable inductive LC contact lens sensor composed of liquid metal has advantages in signal quality and wearing comfort, but currently it has the problem of slightly insufficient sensitivity.      

Recently, the team led by Ma Yinji from Tsinghua University and Song Jizhou from Zhejiang University proposed an LC sensor constructed with liquid metal to further form stretchable inductors and capacitors. The capacitor board and inductor coil can simultaneously respond to changes in IOP, thereby theoretically improving sensitivity. The author modeled the sensing mechanism and conducted design, manufacturing, and various tests. This device has the characteristics of reliability and good signal quality. Especially, its sensitivity has increased threefold, surpassing the most advanced contact lens sensors currently available.

Source: Sensor Expert Network