Tear duct blockage: complete blockage versus a blocked opening

Dr. Mahmoud El Samkary stresses the need to distinguish between two types of tear duct blockage, because the operation differs for each.

Complete blockage of the tear duct

A new drainage channel is created to replace the natural duct, with a stent that is removed after about 6 weeks. The operation can be done under local anesthesia, and the patient goes home the same day.

Blocked opening of the tear duct

Here the opening is widened, and a stent is placed inside the natural duct itself so the opening does not close again.

Why does the tear duct opening close?

• Long-term use of eye drops that contain preservatives.
• Repeated viral or bacterial eye infections.

When should I suspect a blocked tear duct?

If the eye waters constantly, day and night, in one eye or both. In this case, drops containing preservatives should be stopped and replaced with preservative-free drops, and the doctor should assess the type of blockage.