University of California, Davis researchers have made a contact lens with a built-in pressure sensor that could help monitor conditions such as glaucoma and ocular hypertension.

PDMS (polydimethylsiloxane, the organic polymer traditionally used for contact lenses) usually cannot conduct electricity or have complicated features, so they developed new techniques to embed conducting circuits with circuit features of 10 micrometers. A transparent sensor could be worn continuously, sending data out using a small RFID chip.