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Overview

Dacryostenosis, also known as a blocked tear duct, is a fairly common condition that disrupts normal tear drainage. It occurs in infants, in older children, and adults. It is generally not a serious condition and rarely poses a threat to vision.

The outer layer of the eye is coated by a three-layered tear film. The tear film serves several purposes:

Keeps the eyes moist
Protects the eyes from infection and irritation
Keeps the surface of the eyes smooth so light can pass th...Read the full article