External DCR (Tear Duct Surgery)
External DCR is a well-established surgical procedure designed to restore tear drainage by creating a new pathway from the tear sac into the nose.It is a highly effective treatment for persistent watery eyes caused by tear duct obstruction.
What Is External DCR?
External DCR (dacryocystorhinostomy) bypasses a blocked tear duct by forming a new drainage channel.
It is used to treat:
- Blocked tear ducts (nasolacrimal duct obstruction)
- Chronic watery eyes (epiphora)
- Recurrent tear duct infections (dacryocystitis)
By restoring drainage, the procedure resolves persistent tearing and reduces the risk of infection.
Suitability
External DCR is recommended when tearing is clearly related to a structural blockage of the tear drainage system.
It is often considered where long-standing symptoms or recurrent infections significantly impact quality of life.
The Procedure
The procedure is performed under local anaesthetic with sedation and typically takes around 45 minutes.
A small incision is made on the side of the nose to access the tear sac, and a new drainage pathway is created. A fine silicone stent is placed temporarily to support healing.
Recovery & Aftercare
- Mild bruising or swelling around the incision site is common and settles within 1–2 weeks
- Activity is limited initially, with gradual return to normal over several weeks
- The silicone stent is removed after 2–4 weeks
Follow-up ensures the new drainage pathway matures and functions effectively.
Outcomes
External DCR has a high success rate of approximately 95%, offering reliable, long-term relief from tearing.
When appropriately selected, patients experience a significant improvement in comfort and day-to-day function.