Smart contact lens measures IOP and eye movement

Scientists from University of Electronic Science and Technology of China have developed a contact lens that can simultaneously monitor intraocular pressure (IOP) and eye movement – even when the eyes are closed.

Describing the technology in Microsystems & Nanoengineering, the researchers highlighted that the stretchable design of the contact lens enables it to conform closely to the curvature of the eyeball.

“This study presents an innovative, portable acquisition system that marries a flexible bimodal contact lens with a robust data acquisition unit,” they explained.

In experiments in rabbits, the lens demonstrated high sensitivity to IOP fluctuations, with resolution as fine as 1mmHg. In both lab trials and human trials, eye movement was captured with an accuracy of 97%.

Data from the lens can be wirelessly transmitted to mobile devices, enabling clinicians to receive real-time feedback.

Co-lead author, Dr Guang Yao, highlighted that the technology bridges a longstanding gap in ophthalmic care.

“The ability to monitor both IOP and eye movement continuously—even when the eyes are closed—offers a more complete picture of eye health. It enables early intervention and more accurate tracking of disease progression, particularly for glaucoma patients. And because it’s wireless and wearable, it can be used comfortably at home, not just in clinics,” he said.