What your tears could reveal about your brain

A few tears may someday reveal important clues about a person's neurological health.

Researchers reporting in ACS Omega developed a low-cost electrochemical sensor designed to detect dopamine, a neurotransmitter involved in movement, learning, motivation and emotional regulation.

They tested the device using artificial human tears, where it accurately detected a range of dopamine concentrations.

The technology could support the development of new tools for monitoring Parkinson's disease and other conditions linked to atypical dopamine levels. ...