Q10: Congenital malformations of eyelid, lacrimal apparatus and orbit

Q10.5: Congenital stenosis and stricture of lacrimal duct

Tear fluid flows out of the eye via the tear ducts. The tear ducts begin in the inner edge of the upper and lower eyelids. In both places there is a small opening that opens into a narrow channel. The channels join and carry the tear fluid to the inside of the nose. While developing in the womb, many different types of tissue develop in the body. The organs and body parts develop out of the various types of tissue. If tissue fails to develop properly, defects can occur.

Your tear ducts have become narrow or blocked due to the defect. This might be preventing the tear fluid from properly draining to the nose. If the tear fluid does not drain properly it can make the eye water constantly.