Smart contact lens with thin-film sensor enables real-time eye pressure monitoring

Glaucoma is a leading cause of blindness among people who are unable to monitor and manage their intraocular pressure (IOP) daily. The current tools for IOP measurement are not portable, convenient, easily accessible, or capable of continuous (24/7) monitoring.

In a recent breakthrough, a team of researchers from Japan, led by Professor Takeo Miyake from the Graduate School of Information, Production and Systems, Waseda University, Japan, has proposed an innovative design and integration of a thin film into a contact lens, enabling users to monitor their IOP in real time during everyday use.

In this study, the researchers fabricated a resistive sensor based on a cracked PEDOT:PSS/PVA (PEDOT: Poly(3,4-ethylenedioxythiophene); PSS: Poly(styrenesulfonate); PVA: Polyvinyl alcohol) thin film that leverages a multilayer structure and the intrinsic properties of each layer to readily and effectively measure and monitor the IOP in real time.

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