The most common functional abnormality of the infant's lacrimal apparatus is the congenital blockage of the nasolacrimal duct. Non-canalisation of the duct, presence of epithelial debris, mucous plug and bony occlusion are some of the possible causes of blockage. This was a prospective study to identify the etiological agents, predisposing factors and clinical profile of patients with congenital dacryocystitis.
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Husain et al. (2020) studied this question.
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