Which condition may benefit from probing of the tear duct?

Probing of the tear duct is a procedure typically performed when there is blockages or abnormalities in the nasolacrimal system, which can lead to excessive tearing, a condition known as epiphora. In cases of epiphora, the tear ducts may not drain properly, resulting in tears spilling over the eyelids. Probing helps to clear any obstructions in the tear ducts, allowing for an improved passage for tears, thus alleviating the excessive tearing.

Other conditions listed do not directly relate to issues with the tear duct. Glaucoma is a condition associated with increased intraocular pressure, primarily affecting the optic nerve, and does not involve the tear drainage system. Conjunctivitis refers to inflammation of the conjunctiva and is primarily treated with medications rather than surgical or procedural intervention related to tear ducts. Cataracts involve the clouding of the lens of the eye and also do not pertain to the functionality of tear drainage, requiring different treatment approaches like surgical lens replacement.