![Schematic representation of the nasolacrimal system (punctae, lacrimal... | Download Scientific Diagram Schematic representation of the nasolacrimal system (punctae, lacrimal... | Download Scientific Diagram](https://www.researchgate.net/publication/348783149/figure/fig1/AS:984289072144386@1611684210883/Schematic-representation-of-the-nasolacrimal-system-punctae-lacrimal-sac-nasolacrimal_Q320.jpg)
Schematic representation of the nasolacrimal system (punctae, lacrimal... | Download Scientific Diagram
Key procedure of Hasner valve incision. Black arrow indicates probe and... | Download Scientific Diagram
![Dacryoendoscopy-assisted incision of Hasner's valve under nasoendoscopy for membranous congenital nasolacrimal duct obstruction after probing failure: a retrospective study | BMC Ophthalmology | Full Text Dacryoendoscopy-assisted incision of Hasner's valve under nasoendoscopy for membranous congenital nasolacrimal duct obstruction after probing failure: a retrospective study | BMC Ophthalmology | Full Text](https://media.springernature.com/lw685/springer-static/image/art%3A10.1186%2Fs12886-021-01948-w/MediaObjects/12886_2021_1948_Fig3_HTML.png)
Dacryoendoscopy-assisted incision of Hasner's valve under nasoendoscopy for membranous congenital nasolacrimal duct obstruction after probing failure: a retrospective study | BMC Ophthalmology | Full Text
![Francis Deng, MD on X: "The valve of Hasner is the eponym for the plica lacrimalis, the fold at the inferior end of the nasolacrimal duct before it opens into the inferior Francis Deng, MD on X: "The valve of Hasner is the eponym for the plica lacrimalis, the fold at the inferior end of the nasolacrimal duct before it opens into the inferior](https://pbs.twimg.com/media/FjwIP0HX0AEpIXl.jpg:large)
Francis Deng, MD on X: "The valve of Hasner is the eponym for the plica lacrimalis, the fold at the inferior end of the nasolacrimal duct before it opens into the inferior
![endoscopic view of Hasner's valve - vue endoscopique de la valve de Hasner - canal lacrymonasal - YouTube endoscopic view of Hasner's valve - vue endoscopique de la valve de Hasner - canal lacrymonasal - YouTube](https://i.ytimg.com/vi/adSBVgF6knk/maxresdefault.jpg)
endoscopic view of Hasner's valve - vue endoscopique de la valve de Hasner - canal lacrymonasal - YouTube
![Dacryoendoscopy-assisted incision of Hasner's valve under nasoendoscopy for membranous congenital nasolacrimal duct obstruction after probing failure: a retrospective study | BMC Ophthalmology | Full Text Dacryoendoscopy-assisted incision of Hasner's valve under nasoendoscopy for membranous congenital nasolacrimal duct obstruction after probing failure: a retrospective study | BMC Ophthalmology | Full Text](https://media.springernature.com/lw685/springer-static/image/art%3A10.1186%2Fs12886-021-01948-w/MediaObjects/12886_2021_1948_Fig2_HTML.png)
Dacryoendoscopy-assisted incision of Hasner's valve under nasoendoscopy for membranous congenital nasolacrimal duct obstruction after probing failure: a retrospective study | BMC Ophthalmology | Full Text
![Incision of Hasner's valve under endoscopic intranasal surgery for the treatment of nasolacrimal duct obstruction in children | The Journal of Laryngology & Otology | Cambridge Core Incision of Hasner's valve under endoscopic intranasal surgery for the treatment of nasolacrimal duct obstruction in children | The Journal of Laryngology & Otology | Cambridge Core](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20201120110645738-0413:S0022215119002597:S0022215119002597_fig1.png?pub-status=live)
Incision of Hasner's valve under endoscopic intranasal surgery for the treatment of nasolacrimal duct obstruction in children | The Journal of Laryngology & Otology | Cambridge Core
![Normal nasolacrimal drainage system. Schematic illustrates the drainage... | Download Scientific Diagram Normal nasolacrimal drainage system. Schematic illustrates the drainage... | Download Scientific Diagram](https://www.researchgate.net/publication/12415025/figure/fig4/AS:333055010066440@1456417910791/Normal-nasolacrimal-drainage-system-Schematic-illustrates-the-drainage-of-nasolacrimal.png)
Normal nasolacrimal drainage system. Schematic illustrates the drainage... | Download Scientific Diagram
![Pathologies des voies lacrymales de l'adulte | Paupières et Voies Lacrymales | Les maladies de l'oeil | Cabinet d'ophtalmologie des flandres Pathologies des voies lacrymales de l'adulte | Paupières et Voies Lacrymales | Les maladies de l'oeil | Cabinet d'ophtalmologie des flandres](https://www.cof.fr/system/files/styles/large/private/inline-images/cof%20dacryocystite.png?itok=u54-yE0B)
Pathologies des voies lacrymales de l'adulte | Paupières et Voies Lacrymales | Les maladies de l'oeil | Cabinet d'ophtalmologie des flandres
![John Libbey Eurotext - Médecine thérapeutique / Pédiatrie - Larmoiement congénital par anomalie de la valve de Hasner : traitement endoscopique sans pose de sonde d'intubation John Libbey Eurotext - Médecine thérapeutique / Pédiatrie - Larmoiement congénital par anomalie de la valve de Hasner : traitement endoscopique sans pose de sonde d'intubation](https://www.jle.com/e-docs/00/04/A5/77/jlemtp0543gr15.jpg)
John Libbey Eurotext - Médecine thérapeutique / Pédiatrie - Larmoiement congénital par anomalie de la valve de Hasner : traitement endoscopique sans pose de sonde d'intubation
![Pediatric Ophthalmology : Congenital Nasolacrimal Duct Obstruction : Congenital Nasolacrimal Duct Obstruction Introduction : Diseases and Conditions | Pediatric Oncall Pediatric Ophthalmology : Congenital Nasolacrimal Duct Obstruction : Congenital Nasolacrimal Duct Obstruction Introduction : Diseases and Conditions | Pediatric Oncall](https://www.pediatriconcall.com/cgi_bin/diseasesimages/File_1_CNLDO_Figure1.png)
Pediatric Ophthalmology : Congenital Nasolacrimal Duct Obstruction : Congenital Nasolacrimal Duct Obstruction Introduction : Diseases and Conditions | Pediatric Oncall
![Sonographic antenatal diagnosis of congenital dacryocystoceles - Sotiriou - 2012 - Journal of Clinical Ultrasound - Wiley Online Library Sonographic antenatal diagnosis of congenital dacryocystoceles - Sotiriou - 2012 - Journal of Clinical Ultrasound - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/be99ebb2-322b-488c-a863-dc79c8d6cd19/mfig001.jpg)
Sonographic antenatal diagnosis of congenital dacryocystoceles - Sotiriou - 2012 - Journal of Clinical Ultrasound - Wiley Online Library
![Congenital Dacryocystocele Associated With Intranasal Cysts: Diagnosis and Management - Shashy - 2003 - The Laryngoscope - Wiley Online Library Congenital Dacryocystocele Associated With Intranasal Cysts: Diagnosis and Management - Shashy - 2003 - The Laryngoscope - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/5811031e-e631-4534-8c87-46d721ad558d/mfig002.jpg)