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The lateral canthal tendon is a strong band of tissue at the outer corner of the eye. It helps anchor the upper and lower eyelids to the bone around the eye socket. This support keeps the lids in the right position against the eye.
read more about lateral canthal tendon ...It helps the eyelids sit snugly so tears spread evenly and the eye surface stays protected. It also helps the outer corner keep its shape when you blink. Good support can affect comfort and how well the lids close.
Aging can make the tendon and nearby tissues looser over time. Injury, prior eyelid surgery, or long-term swelling and irritation can also affect support. When the outer corner loses tension, the lid may shift out of place.
You might notice the lower lid drooping or turning outward, especially on one side. Some people have watery eyes, irritation, or a feeling that the lid is not sitting right. Changes at the outer corner are a common clue.
Treatment depends on the cause and how much the lid position has changed. Options may include managing eyelid inflammation or dryness, or a procedure to tighten and support the outer corner. An eye exam helps confirm what's going on and the best next step.
They're related but not the same thing. The canthus is the corner where the eyelids meet, while the tendon is the supporting structure that anchors that corner. The tendon helps keep the canthus stable.
Yes, it can contribute by changing how the lower lid sits and how tears drain and spread. Watering can also happen from irritation or blockage elsewhere in the tear system. An exam can sort out the most likely cause.
An eye specialist may recommend a procedure that supports or tightens the outer corner to improve lid position. The exact method depends on your anatomy and the problem being treated. Your doctor will explain expected changes and recovery.
It's a good idea to get checked if one lid droops, turns outward, or causes ongoing irritation. Also seek care if watering or discomfort is persistent. Early evaluation can prevent worsening lid position issues.
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Lateral Canthotomy and Cantholysis. American Academy of Ophthalmology. https://www.aao.org/education/annual-meeting-video/lateral-canthotomy-and-cantholysis. November 26, 2024 .
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Canthoplasty. American Academy of Ophthalmology. https://eyewiki.org/Canthoplasty. January 27, 2026.
Ptosis: Droopy Eyelid Causes and Treatment. Healthline. https://www.healthline.com/health/eyelid-drooping. Apr 10, 2025.