新生儿及儿科医学

抽象的

Causes of tearing in pediatric age group

Mukhdoom Rakhshan Jameel Qureshi

There are numerous causes of childhood tearing, among them the following are the most important:  Nasolacrimal Duct Obstruction  Congenital Glaucoma  Corneal Ulcer  Conjunctivitis  Distichiasis The commonest causes of childhood tearing are nasal lacrimal duct obstruction. This is typically due to a mucus membrane obstruction at lower end of nasal lacrimal duct estimated to be present in up to 20% of new born babies. Lacrimal apparatus comprises of lacrimal gland, accessory lacrimal gland, lacrimal passage which includes puncta canaliculi, lacrimal sac and nasal lacrimal duct.