Punctal Plugs

Each upper and lower eyelid has a tiny opening at its inner corner called the punctum (plural: puncta). Tears drain through the puncta into small tubes (canaliculi), then into the lacrimal sac and down through the nasolacrimal duct into the nose. That is why your nose runs when you cry.

A punctal plug is a small silicone or collagen device — about the size of a grain of rice — that fits snugly into the punctum. By blocking the drain, the plug:

• Keeps more of your own tears on the eye for longer.
• Makes any artificial tears or prescription eye drops last longer too.
• Lifts the tear meniscus (the thin pool of tears at the lid edge), which has been measured directly with imaging studies ⁵.

Two main types of plugs:

• Silicone punctal plugs. Last until they fall out or are removed by the doctor. Some patients keep them for many years; one report describes silicone plugs lasting 19 years in place ⁶.
• Dissolvable collagen plugs. Slowly absorb over days to a few months. Used as a short-term trial before placing silicone plugs.

Plugs can be placed in the lower puncta only, the upper puncta only, or both. Most patients start with the lower puncta because they handle most of the tear drainage.

Punctal plugs are mainly used for dry eye disease, especially the tear-deficient (aqueous-deficient) type where your eyes do not make enough tears. They are usually offered when:

• Lubricating drops alone do not give enough relief.
• Symptoms keep coming back despite warm compresses, lid hygiene, and drops.
• Prescription dry-eye drops like cyclosporine or lifitegrast need a boost — combining punctal plugs with cyclosporine has been shown to outperform cyclosporine alone in some randomized trials ².
• Sjögren's syndrome dry eye, which is autoimmune and tends to be severe. Trials of dissolvable plugs combined with cyclosporine in Sjögren's-related dry eye show improved symptoms over cyclosporine alone ⁷.
• Refractory dry eye with surface damage. A randomized sham-controlled trial showed that punctal plugging improved ocular surface damage in refractory dry eye, with induced epiphora as a tolerable trade-off ⁸.
• Contact lens-related dryness in some patients.
• Dry eye after refractive surgery (LASIK, PRK, SMILE).

Punctal plugs are not the right treatment for:

• Eyes that already water a lot (you would just be trapping more tears).
• Active eye infection (conjunctivitis, dacryocystitis).
• Severe blepharitis flares — treat the lid disease first.
• Allergic conjunctivitis with mostly itching and watering.

Punctal plugs are very safe. Most side effects are mild and reversible by removing the plug.

• Too much tearing (epiphora). The most common issue. Tears spill onto the cheeks because they cannot drain. Usually solved by removing one plug or using a smaller size.
• Plug loss (extrusion). Silicone plugs can pop out, especially in the first year. They can be replaced in a few minutes in the office.
• Granuloma. A small fleshy bump at the punctum, sometimes from the plug rubbing the conjunctiva. Removing the plug usually fixes it.
• Canaliculitis. A low-grade infection of the tear duct that can show up months or years after a plug is placed. Symptoms include redness at the inner corner of the lid, discharge, and tearing. Treated by removing the plug, irrigating, and antibiotics. Microbiology studies of removed plugs show that bacteria and biofilm can colonize the device ⁹.
• Plug migration into the canaliculus. Rare. The plug slips deeper into the tear duct. May need a small office procedure to remove.
• Infection. Endophthalmitis (an infection inside the eye) attributed to a punctal plug is very rare but has been reported in case reports ¹⁰.

If you develop new redness, pain, or discharge from the inner corner of the eyelid weeks or months after plug placement, see your eye doctor — these can be signs of canaliculitis.

What punctal plugs cost in the U.S.:

• Silicone punctal plugs: about $200-$600 per pair, including the in-office placement.
• Dissolvable collagen plugs: about $100-$300 per pair.
• Permanent punctal cautery (when plugs do not stay in): about $300-$800 per eye.

What insurance usually covers:

• Medicare and most U.S. health insurance plans cover punctal plugs when you have a documented diagnosis of dry eye disease (with codes for keratoconjunctivitis sicca, dry eye syndrome, or related conditions).
• You may need a prior authorization or a trial of artificial tears or prescription dry-eye drops first.
• Plug replacement after the original plug falls out is usually also covered.

Out-of-pocket costs:

• Many people pay only their normal copay for the office visit.
• If your insurance does not cover plugs, the cash price is usually $200-$600 per pair.
• Ask the office for a written estimate before scheduling so you are not surprised.