Evaluation and Management of Congenital Nasolacrimal Duct Obstruction

摘要: Congenital nasolacrimal obstruction is a common disorder in infants that results persistent tearing and may lead to infections, such as dacryocystitis, orbital cellulitis, bacterial conjunctivitis. The true incidence of this healthy newborns remains controversial. most frequently quoted number 6% comes from study 200 consecutive live births the 1940s which patency was assessed by presence or absence discharge on compression lacrimal sac. Estimates other studies, often use different criteria for diagnosis, vary considerably 1.2% 30%. higher children who have craniofacial disorders Down's syndrome. This article reviews causes treatment congenital obstruction.