In a nutshell
Wind, smoke, and other irritants can increase tear flow. Paradoxically, a dry eye surface can also cause watery eyes.
Why does it happen?
Sensory nerves on the eye surface report irritation through the trigeminal nerve. In the brainstem, pathways of the facial nerve stimulate a parasympathetic response. The lacrimal gland produces more fluid, which moistens the surface and washes particles away.
Frequency
Reflex tears are part of the normal protection of a functioning eye. How often they are noticeable depends on irritation, environmental conditions, and the tear system.
Frequency is a qualitative description, not your individual probability.
Is it normal?
Brief tearing in response to a mild irritant is a normal protective response.
When to seek advice
Severe eye pain, worsening vision, or an injury needs immediate ophthalmic assessment; after chemical contact, rinse thoroughly at once and obtain medical help.
Does this happen to you?
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Sources (1)
- Nervöse Regulation der Sekretion der Tränendrüse (opens a new tab)
This source supports the description and physiological context of this entry.
Editorial update: . AI-assisted research and editing; not individually reviewed by a physician. How we research
