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The lacrimal pump mechanism is the way blinking helps drain tears from your eye. Each blink gently moves tears through tiny openings in the eyelids and into the tear ducts. It keeps the eye surface comfortable and prevents tears from spilling over.
read more about lacrimal pump mechanism ...When you blink, your eyelids and nearby muscles briefly squeeze parts of the tear drainage pathway. When the blink ends, that pressure releases and helps pull tears inward. This push-and-pull motion moves tears toward the nose.
Problems can happen if the eyelids are too loose, the openings (puncta) are blocked, or the drainage channels are inflamed. Scarring, infection, or certain nerve issues can also affect normal blinking and drainage. Even chronic eyelid irritation can make drainage less efficient.
The most common sign is watery eyes, especially in wind or cold air. You may also notice sticky discharge, irritation, or blurred vision that improves after wiping tears. If one eye waters much more than the other, it's worth checking.
An eye doctor can examine your eyelids and puncta and may test drainage with dye or gentle flushing. Treatment depends on the cause and may include treating eyelid inflammation, adjusting dry eye care, or clearing a blockage. Some cases need a simple procedure or surgery to improve drainage.
No. Many people have watery eyes because tears are not draining well, not because they are making extra tears. Irritation and dry eye can also trigger reflex tearing that looks like ?too many tears.?
Contact lenses usually do not block tear ducts, but they can worsen dryness or irritation in some people. That irritation can cause reflex tearing and make watering more noticeable. If tearing starts after a lens change, ask about fit and comfort options.
Puncta are the tiny openings on the eyelid margins where tears enter the drainage system. They act like entry points that guide tears into small channels. If they are blocked or turned away from the eye, tears can spill over.
Get checked if tearing is constant, mainly on one side, or comes with pain, swelling, or discharge. Also seek care if your vision changes or the eye looks very red. Early evaluation helps rule out blockage or infection.
How Tears Work. National Eye Institute. https://www.nei.nih.gov/learn-about-eye-health/healthy-vision/how-eyes-work/how-tears-work. Updated August 6, 2025.
Blocked Tear Duct. Cleveland Clinic. https://my.clevelandclinic.org/health/diseases/17260-blocked-tear-duct-nasolacrimal-duct-obstruction. Updated January 19, 2024.
Lacrimal Drainage Apparatus. Ophthalmology Training. https://www.ophthalmologytraining.com/core-principles/ocular-anatomy/adnexal-structures/lacrimal-drainage-apparatus. n.d.
The Optometrist's Guide to Managing Eyelid Disorders. Eyes on Eyecare. https://eyesoneyecare.com/resources/optometrists-guide-to-managing-eyelid-disorders-with-cheat-sheet/. January 21, 2026.
Tear System (Lacrimal Apparatus). Cleveland Clinic. https://my.clevelandclinic.org/health/body/24415-lacrimal-apparatus. Updated November 2, 2022.