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What Is Dilation and Irrigation (Tear Duct)?

Dilation and irrigation is a procedure used to check whether the tear duct is open and draining properly. The doctor gently widens the punctum, then flushes saline through the duct to see how easily it passes. This helps identify blockages or narrowing that may cause watery eyes, discomfort, or recurring infections. The procedure is quick and often well tolerated by both adults and children. Results offer immediate insight into how tears move through the drainage system.

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What Is Dilation and Irrigation (Tear Duct)?

Dilation and irrigation is a procedure used to check whether the tear duct is open and draining properly. The doctor gently widens the punctum, then flushes saline through the duct to see how easily it passes. This helps identify blockages or narrowing that may cause watery eyes, discomfort, or recurring infections. The procedure is quick and often well tolerated by both adults and children. Results offer immediate insight into how tears move through the drainage system.

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Why Is Dilation and Irrigation Done?

This method helps pinpoint the location and severity of a blockage. Many people undergo the procedure when watery eyes or frequent tearing do not improve with basic care. It also helps determine whether further testing, probing, or imaging is needed. Because the process is straightforward, it fits easily into routine clinic visits. The findings guide the next steps in treatment.

What Happens During Dilation and Irrigation?

The procedure follows a series of simple steps:

  • A numbing drop is placed on the eye for comfort.
  • The punctum is widened gently using a small dilator.
  • A thin cannula is inserted into the duct opening.
  • Saline is flushed through the duct to observe flow.
  • The doctor watches how quickly fluid exits through the nose or throat.

What Happens After the Procedure?

After irrigation, the doctor explains whether the duct is open or blocked. Mild irritation or watering may occur briefly but usually fades quickly. If a blockage is present, next steps may include massage, probing, or surgery depending on age and symptoms. Some people need short-term medication if inflammation is involved. Follow-up visits help track progress and comfort.

How Do Eye Doctors Perform Tear Duct Dilation and Irrigation?

The goal is to test whether fluid can travel through the drainage pathway without resistance. Doctors numb the area first, then gently open the punctum so a small cannula can enter without scraping the tissue. As saline is flushed through, they watch for smooth flow and also listen to what you feel, like a salty taste in the throat, which suggests the pathway is open. If saline backs up or comes out of the opposite punctum, that pattern helps narrow down where the obstruction is located.

Frequently Asked Questions About Dilation and Irrigation

Does dilation and irrigation hurt?

Most people feel mild pressure rather than pain. Numbing drops help make the experience comfortable. The procedure is brief and well tolerated. Any lingering sensation fades quickly.

Can the procedure fix a blockage permanently?

Minor narrowing sometimes improves after irrigation, but stronger blockages often need further treatment. Probing or surgery offers longer-lasting results. Doctors suggest options based on age and findings. Plans vary from person to person.

Can children undergo dilation and irrigation?

Yes, the method is commonly used for infants and young children with tearing problems. Pediatric eye doctors perform it frequently. The process is quick and usually tolerated well. Parents receive guidance on next steps afterward.

What if saline does not pass through the duct?

A full blockage is likely. Doctors then discuss whether probing or imaging is needed to evaluate the duct. The approach depends on age, symptoms, and cause. Follow-up helps determine the best path forward.

References

Epiphora Clinical Testing. StatPearls - NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK557424/. Accessed March 20, 2026.

Dacryostenosis. StatPearls - NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK563132/. Accessed March 20, 2026.

Secondary Acquired Nasolacrimal Duct Obstruction. EyeWiki. https://eyewiki.org/Secondary_Acquired_Nasolacrimal_Duct_Obstruction. Accessed March 20, 2026.

Lacrimal syringing. PubMed Central. https://pmc.ncbi.nlm.nih.gov/articles/PMC2760283/. Accessed March 20, 2026.

Dacryocystorhinostomy: An Update. American Academy of Ophthalmology. https://www.aao.org/education/current-insight/dacryocystorhinostomy-update. Accessed March 20, 2026.