The special contact lens called Triggerfish is fitted with a micro-chip and micro-processor.
Here's how it works: The patient puts in the contact lens and then inserts a patch, which has a special antenna inside.
The antenna transmits data to a recorder which is then uploaded to a computer.
Doctors are then able to monitor certain measurements and internal eye pressure, which is a key risk factor for glaucoma.
Patients say the device is amazing, but looks sort of silly.
"I look like a character out of Star Trek. And everyone that looked at it would see it and go ... I could tell they wanted to ask me about it but didn't," said clinical trial patient James Guerra.
Triggerfish is part of a clinical trial. Doctors hope it will be a key tool in fighting glaucoma, which affects 70 million people around the world.