Tear secretion from lacrimal gland is essential for ocular health, but the regulatory role of sympathetic nervous system is unclear. The authors show that sympathetic activation suppresses lacrimal ...

Purpose: To design a diagrammatic record of lacrimal disease using easily interpretable symbols. Methods: This diagrammatic record was developed from existing models. A simple outline for the eyelids, ...

Yawning is a normal human reflex, but scientists are still not sure why it happens. Some people find that their eyes water when they yawn. This may be due to pressure on the tear glands or eye fatigue ...

If a tear duct becomes blocked, tears build up and irritate the eyes. This irritation causes painful swelling, makes the eyes appear continuously watery, and increases the risk of infection. When the ...