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Tears drain through the canaliculi, lacrimal sac and naso-lacrimal duct into the nose. Blockage of the naso-lacrimal duct prevents drainage of the lacrimal sac, which may lead to infection, causing a painful swelling at the side of the nose below the medial canthus. This may present as a chronically
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The lacrimal sac lies within a fossa in the anterior portion of the medial orbital wall. This fossa is formed by the frontal process of the maxillary bone and the lacrimal bone. The sac is surrounded by fascia, continuous with the periorbita, which runs from the anterior to the posterior lacrimal
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watery, discharging eye, or as an acutely inflamed abscess. This should be treated with oral broad-spectrum antibiotics. The problem may recur unless drainage into the nose is re-established.
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It is oval in form and measures from 12 to 15 mm. in length; its upper end is closed and rounded; its lower is continued into the nasolacrimal duct.
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It serves as a reservoir for overflow of tears, in which the lacrimal sac pumps inward and outward driven by the
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220:, with surrounding connective tissue. The Lacrimal Sac also drains the eye of debris and microbes.
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Beare, Nicholas A.V.; Bastawrous, Andrew (2014). "Ophthalmology in the
Tropics and Sub-tropics".
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The lacrimal sac has been opened showing internal organization as well as the naso-lacrymal duct.
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Anatomy: The lacrimal sac extends approximately 10 mm above the axilla of the middle turbinate.
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The tarsi and their ligaments. Right eye; front view. (Lacrimal sac visible at middle right.)
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Knowledge articles incorporating text from the 20th edition of Gray's
Anatomy (1918)
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181:, which conveys this fluid into the nasal cavity. Lacrimal sac occlusion leads to
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Its superficial surface is covered by a fibrous expansion derived from the
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Remington, Lee Ann (2012). "Ocular Adnexa and
Lacrimal System".
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200:, and its deep surface is crossed by the lacrimal part of the
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204:, which is attached to the crest on the lacrimal bone.
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297:. Right side. (Lacrimal sac visible at upper right.)
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Clinical
Anatomy and Physiology of the Visual System
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177:, which drain tears from the eye's surface, and the
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212:Like the nasolacrimal duct, the sac is lined by
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165:, and is lodged in a deep groove formed by the
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393:Sacks, Raymond; Naidoo, Yuresh (2019-01-01).
366:Sobotta's Atlas and Textbook of Human Anatomy
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27:Upper, dilated end of the nasolacrimal duct
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378:: CS1 maint: location missing publisher (
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48:shown through dissection on the left side.
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281:Left orbicularis oculi, seen from behind.
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337:This article incorporates text in the
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476:Manson's Tropical Infectious Diseases
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656:Levator palpebrae superioris muscle
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484:10.1016/b978-0-7020-5101-2.00068-6
447:10.1016/b978-1-4377-1926-0.10009-8
405:10.1016/B978-0-323-47664-5.00017-1
240:The lacrimal sac can be imaged by
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478:. Elsevier. pp. 952–994.e1.
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396:Endoscopic Dacryocystorhinostomy
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161:is the upper dilated end of the
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214:stratified columnar epithelium
171:frontal process of the maxilla
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364:Dr. Johannes Sobotta (1909).
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631:Trochlea of superior oblique
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345:of the 20th edition of
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269:Medial wall of left orbit.
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734:Accessory lacrimal glands
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666:Medial palpebral ligament
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248:is injected, followed by
198:medial palpebral ligament
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232:muscle during blinking.
638:Inferior oblique muscle
626:Superior oblique muscle
399:. pp. 143–148.e1.
611:Inferior rectus muscle
606:Superior rectus muscle
137:Anatomical terminology
616:Lateral rectus muscle
216:with mucus-secreting
621:Medial rectus muscle
46:lacrimal apparatusis
889:Otorhinolaryngology
884:Human head and neck
719:Lacrimal canaliculi
175:lacrimal canaliculi
711:Lacrimal apparatus
321:Lacrimal apparatus
295:lacrimal apparatus
173:. It connects the
874:Human eye anatomy
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804:Plica semilunaris
771:Nasolacrimal duct
724:Lacrimal caruncle
691:Palpebral fissure
493:978-0-7020-5101-2
456:978-1-4377-1926-0
256:Additional images
202:orbicularis oculi
179:nasolacrimal duct
163:nasolacrimal duct
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94:saccus lacrimalis
16:(Redirected from
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761:Lacrimal punctum
756:Lacrimal papilla
744:Ciaccio's glands
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578:Ethmoid bone
558:Frontal bone
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418:. Retrieved
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218:goblet cells
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155:lacrimal sac
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106:A15.2.07.068
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33:Lacrimal sac
799:Conjunctiva
244:, in which
230:orbicularis
83:Identifiers
863:Categories
816:Periorbita
420:2020-05-08
327:References
374:cite book
343:page 1028
208:Histology
189:Structure
315:See also
224:Function
853:Anatomy
792:Unibrow
787:Eyebrow
696:Canthus
686:Eyelash
598:Muscles
542:of the
462:crests.
236:Imaging
66:Details
839:Portal
661:Tarsus
648:Eyelid
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351:(1918)
72:Artery
780:Other
551:Bones
540:orbit
341:from
141:[
130:20289
89:Latin
538:The
488:ISBN
451:ISBN
409:ISBN
380:link
293:The
169:and
153:The
118:6857
101:TA98
44:The
544:eye
480:doi
443:doi
401:doi
157:or
125:FMA
113:TA2
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376:}}
372:{{
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
