watery eyes for one of two reasons, and sometimes a combination
of the two.
Firstly, and most commonly, the eyes may water if there is
some irritation present around the eye, for example irritation
of the eyelids (blepharitis), allergy or a lump on the eyelids.
Another reason for the eyes to water is if there is any nasal
In these cases eliminating or reducing the cause of the irritation
should help with the symptoms.
Secondly the eyes water if there is a blockage of the drainage
system (nasolacrimal duct) around the eye, preventing the
normal tears from draining away so that they overflow and
run down the cheek. The most common cause of this is a narrowing
of the nasolacrimal system with age called nasolacrimal duct
narrowing or obstruction. It can also sometimes occur after
trauma or an eye infection.
Normal anatomy of the nasolacrimal system
If there is a narrowing or blockage of the nasolacrimal duct,
then surgery is usually required to create an alternative
passage for the tears to drain away. The operation is called
a Dacrocystorhinostomy (DCR for short).