LACRIMAL DUCT OBSTRUCTION
\lˈakɹɪmə͡l dˈʌkt ɒbstɹˈʌkʃən], \lˈakɹɪməl dˈʌkt ɒbstɹˈʌkʃən], \l_ˈa_k_ɹ_ɪ_m_əl d_ˈʌ_k_t ɒ_b_s_t_ɹ_ˈʌ_k_ʃ_ə_n]\
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Interference with the secretion of tears by the lacrimal glands. Obstruction of the lacrimal sac or nasolacrimal duct causing acute or chronic inflammation of the lacrimal sac (DACRYOCYSTITIS). It is caused also in infants by failure of the nasolacrimal duct to open into the inferior meatus and occurs about the third week of life. In adults occlusion may occur spontaneously or after injury or nasal disease. (Newell, Ophthalmology: Principles and Concepts, 7th ed, p250)
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