Lab on a Contact Lens Can Measure Stress Through Serotonin
Researchers have developed a miniature sensor that fits onto a contact lens, capable of detecting serotonin levels in tears. By monitoring this neurotransmitter, the device aims to provide real insights into an individual’s stress and mood. The technology could enable health tracking, though further testing is required before clinical use. It uses an optical readout that can be linked to a smartphone app for monitoring.