How the tears are drained
Lacrimal gland keeps producing tears in order to keep eye surface moisturized. Part of the tears is vaporized and most of it are drained into nasal cavity. As the eye blinks, eye lid pushes excessive liquid across the eye into the drains (puncta) at the inner corner of the eye, then through canaliculi that connect the eye with the nose into a tear sac (lacrimal sac) that lies beside the nose. Then sac narrows into the tear duct (nasolacrimal duct), which drains through the nasal bone into the nostril. The whole passage of tears is called Nasolacrimal passage.
When the passage is obstructed/blocked at any place or too narrowed to drain the tear smoothly or tear duct get inflamed, patient would have tearing eye.
AIER East provides either laser treatment or surgery methods to treat tear duct obstruction. Different from the traditional surgery which would leave scar on the face, now the treatment is quicker and more efficient without any scar left.