Wearable Dual-Element Intraocular Pressure Contact Lens Sensor

Abstract Continuous profiles of intraocular pressure (IOP) can improve the diagnostic accuracy and the management of glaucoma. Profiles from contact lens sensors (CLS) have significant errors. The IOP error from a single resonator sensor is large in a variable ocular environment. A dual-resonator sensor is developed in this study to reduce the error. Contact lens sensors were prototyped and tested on rubber eyes. A new IOP-signal gauged model for dual-resonator sensor developed in this study successfully removed the environmental noise. The IOP error was reduced to less than ±3 mmHg. This study showed that the new dual-resonator sensor and the IOP model reduced IOP errors to levels comparable to the errors in ex-vivo and in-vivo tonometry. The new dual-resonator sensor can provide IOP profiles to improve the diagnostic accuracy and management of glaucoma.