Contact Lens Sensor with Anti-jamming Capability and High Sensitivity for Intraocular Pressure Monitoring
Xueyang Ren, Yunfan Zhou, Fangzhou Lu, Leili Zhai, Hao Wu, Zhongda Chen, Changxian Wang, Xuefei Zhu, Yandong Xie, Pingqiang Cai, Juan Xu, Xianglong Tang, Jianqing Li, Jin Yao, Qin Jiang, Benhui Hu
Abstract
Contact lens sensors provide a noninvasive approach for intraocular pressure (IOP) monitoring in patients with glaucoma. Accurate measurement of this imperceptible pressure variation requires highly sensitive sensors in the absence of simultaneously amplifying IOP signal and blinking-induced noise. However, current noise-reduction methods rely on external filter circuits, which thicken contact lenses and reduce signal quality. Here, we introduce a contact lens strain sensor with an anti-jamming ability by utilizing a self-lubricating layer to reduce the coefficient of friction (COF) to remove the interference from the tangential force. The sensor achieves exceptionally high sensitivity due to the strain concentration layout and the confined occurrence of sympatric microcracks. The animal tests prove our lens can accurately detect IOP safely and reliably.