Tears are produced by the lacrimal glands. They flow down across the eye along the lid margins and are spread across the eye by blinking.
Tears drain from the eye through two small openings called the upper and lower punctum which are located on the eyelid near the nose.
They then flow into the lacrimal sac. From the sac, the tears are pumped by the blinking action of the eyelids into the tear duct into and into the nose.
What are the Causes of a Watering Eye?
Excessive production of tears – this is rare.
Malposition of the Punctum – the punctum must be positioned next to the eye to drain tears. If, the eyelids are incorrectly positioned i.e turning inwards or outwards, the punctum will no longer be in the correct position for adequate tear drainage.
Punctal Stenosis – the punctum may close up resulting in watering.
Blockage of the lacrimal sac or tear duct
How can a Watering Eye be Treated?
Sac wash out – may be carried to determine whether or not there is a blockage in the sac or tear duct.
Dilating the punctum – by a minor operation
Correcting the lid position – by an operation.
Dacryocytorhinostomy (DCR) – is an operation to bypass the blockage in tear duct or sac.