Terasaki researchers outline requirements for reliable wearable tear sensors
Published in Journals, Noninvasive, Tools.
Publication date: October 10, 2026.
In an October 8 announcement, the Terasaki Institute highlighted a Nature Sensors perspective proposing a framework for wearable sensors that monitor tear chemistry. Researchers from Terasaki, UC San Diego and USC argue that reliable readings require accounting for the changing tear film.
Blinking, evaporation and fluid turnover can alter measurements independently of disease. The authors propose combining chemical measurements with information about blink patterns and tear flow, and matching measurement frequency to the biomarker being tracked.
The framework considers the biological interface, performance during everyday wear, clinical translation and user trust. Smart contact lenses, devices near the tear drainage openings and patches around the eye are presented as complementary designs for different monitoring tasks.
Dry-eye disease is identified as a potential starting point, with glaucoma and metabolic monitoring also discussed. The practical challenge is distinguishing normal fluctuations from meaningful biological changes over time.
This publication presents design recommendations, rather than results proving that a particular sensor improves diagnosis or patient outcomes. Longer studies comparing tear readings with established clinical measurements remain necessary.
Sources: Terasaki Institute, October 8, 2026; Nature Sensors perspective, DOI: 10.1038/s44460-026-00131-2.