A close-up depiction of an eye with abstract data surrounding it.

A close-up depiction of an eye with abstract data surrounding it.

A close-up depiction of an eye with abstract data surrounding it.

Wearable sensors would be placed near the tear duct or mouth to collect biofluid samples, which would then produce data viewable on a user’s smartphone or sent to their doctor, according to Penn State researchers.

IMAGE: iStock/@aywan88/in-future