Results 41 to 50 of about 414,824 (295)

Anatomic study of the lacrimal fossa and lacrimal pathway for bypass surgery with autogenous tissue grafting

open access: yesIndian Journal of Ophthalmology, 2014
Purpose: To study the microsurgical anatomy of the lacrimal drainage system and to provide anatomical evidence for transnasal endoscopic lacrimal drainage system bypass surgery by autogenous tissue grafting.
Hai Tao   +4 more
doaj   +1 more source

A case report of chronic dacryocystitis caused by nasal stones

open access: yesBMC Ophthalmology, 2023
Background This paper reports a case of chronic dacryocystitis due to nasal stones. Case presentation An 84-year-old male patient was admitted to the hospital with chronic dacryocystitis of the right eye due to tearing and purulent discharge from the ...
Yandi Huo, Luoxiang Li, Ya Mo, Sirui Guo
doaj   +1 more source

Detection of Helicobacter Pylori in the lacrimal sac mucosa of the patients with primary acquired nasolacrimal duct obstruction [PDF]

open access: yes, 2011
Helicobacter pylori have been detected in sinonasal mucosa in both normal and pathologic condition. The nasolacrimal duct is within the medial wall of maxillary sinus and open into the nasal cavity, so ascending colonization of nasolacrimal duct and ...
Abtahi, Seyed Mohammad Bagher   +2 more
core   +1 more source

Imaging of adult ocular and orbital pathology - a pictorial review [PDF]

open access: yes, 2014
Orbital pathology often presents a diagnostic challenge to the reporting radiologist. The aetiology is protean, and clinical input is therefore often necessary to narrow the differential diagnosis.
Brennan, Paul   +8 more
core   +1 more source

Length correction of 2D discontinuities or perforations at large wavelengths and for linear acoustics [PDF]

open access: yesActa Acustica united with Acustica, 104(2), 2018, pp. 243-250 (8), 2018
This work focuses on the length correction due to radiation effect of a duct discontinuity or at the surface of a perforated plate in the linear acoustic domain and at large wavelengths. Two results are obtained from the comparison of models used in the literature for different geometries of duct discontinuities or perforations.
arxiv   +1 more source

A Case of Nasolacrimal Duct Obstruction Caused by a Lacrimal Sac Retention Cyst [PDF]

open access: yesJournal of Rhinology
Acquired nasolacrimal duct obstruction may result from chronic infection, lacrimal stones, anatomical variations such as aberrant ethmoid cells, facial fractures, or complications following nasal surgery.
Seung Hyuck Yang   +3 more
doaj   +1 more source

Asymptomatic lacrimal flow abnormalities in patients with septal deviations and turbinate hypertrophy [PDF]

open access: yes, 2008
Background: This study aimed to investigate the lacrimal flow in patients affected by septal deviations and turbinate hypertrophy and to evaluate changes after rhinoseptoplasty with dacryocystography (DCT) and computed tomographic dacryocystography (CT ...
Bottini, Dj   +6 more
core   +1 more source

Deep Learning for Classifying and Characterizing Atmospheric Ducting within the Maritime Setting [PDF]

open access: yes, 2020
Real-time characterization of refractivity within the marine atmospheric boundary layer can provide valuable information that can potentially be used to mitigate the effects of atmospheric ducting on radar performance. Many duct characterization models are successful at predicting parameters from a specific refractivity profile associated with a given ...
arxiv   +1 more source

Androgen receptor-positive ductal adenocarcinoma of the nasolacrimal duct: A case report

open access: yesAmerican Journal of Ophthalmology Case Reports, 2017
Purpose: Primary ductal adenocarcinoma arising in the structures of the lacrimal apparatus is extremely rare, and the entity is considered a lacrimal counterpart of salivary duct carcinoma, of which the majority are known to express androgen receptor (AR)
In Ah Park   +3 more
doaj   +1 more source

Sex and Age Morphometric Variations in Bony Nasolacrimal Duct and Fossa for Lacrimal Gland in Mexican Population [PDF]

open access: yes, 2018
SUMMARY: Primary acquired nasolacrimal duct obstruction is greater in women over 40 years and has been associated with morphometric variations in the osseous nasolacrimal duct, which varies according to age and sex.
Aguilar Morales, Kouatzin   +12 more
core   +1 more source

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