CARREIRO, J (2009). “Head and neck”. Pediatric Manual Medicine. Elsevier. pp. 13–97. doi:10.1016/b978-0-443-10308-7.00002-8. ISBN978-0-443-10308-7. https://archive.org/details/pediatricmanualm00doja. "Dacryostenosis is a condition whereby the nasolacrimal duct is narrowed or blocked and the glandular secretions into the eye are prevented from draining properly. The secretions collect around the orifice of the duct and in the corner of the eye, where they thicken, resulting in a gooey, sticky substance that further clogs any drainage route."
Herbert, Ronald A.; Janardhan, Kyathanahalli S.; Pandiri, Arun R.; Cesta, Mark F.; Miller, Rodney A. (2018). “Nose, Larynx, and Trachea”. Boorman's Pathology of the Rat. Elsevier. pp. 391–435. doi:10.1016/b978-0-12-391448-4.00022-8. ISBN978-0-12-391448-4. "The paired nasolacrimal ducts carry lacrimal secretions from the eye to the nasal cavity, and originate as oval openings near the edge of the medial canthus of the eyelids. Initially the duct is small and circular, but in the middle portion, the diameter increases and the appearance is more oblong and saccular. The diameter again decreases before the duct enters the ventrolateral nasal vestibule medial to the root of the incisor tooth approximately 2 mm caudal to the nares."
CARREIRO, J (2009). “Head and neck”. Pediatric Manual Medicine. Elsevier. pp. 13–97. doi:10.1016/b978-0-443-10308-7.00002-8. ISBN978-0-443-10308-7. https://archive.org/details/pediatricmanualm00doja. "Dacryostenosis is a condition whereby the nasolacrimal duct is narrowed or blocked and the glandular secretions into the eye are prevented from draining properly. The secretions collect around the orifice of the duct and in the corner of the eye, where they thicken, resulting in a gooey, sticky substance that further clogs any drainage route."
Stagner, Anna M.; Jakobiec, Frederick A.; Eagle, Ralph C.; Charles, Norman C. (2018). “Infections of the Eye and Its Adnexa”. Diagnostic Pathology of Infectious Disease. Elsevier. pp. 648–685. doi:10.1016/b978-0-323-44585-6.00021-7. ISBN978-0-323-44585-6. "Dacryocystitis is produced by obstruction of the nasolacrimal duct with resultant tear stasis. Clinically, patients display erythema and swelling of the lacrimal sac, creating a mass in the medial canthal area, centered below the medial canthal tendon."
“Medical Definition of PLICA LACRIMALIS”. Merriam-Webster Medical Dictionary (2020年5月8日). 2020年5月8日閲覧。 “an imperfect valve at the opening of the nasolacrimal duct into the inferior meatus of the nose”
