lacrimal system

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lacrimal system

The tear-producing LACRIMAL GLANDS and the drainage system—the CANALICULI and the NASOLACRIMAL DUCT—that carry surplus tears down into the nose.


pertaining to tears.

lacrimal apparatus
a group of organs concerned with the production and drainage of tears; it is a nutritive and protective device that helps keep the eye moist and free of dust and other irritating particles. Includes lacrimal gland, accessory lacrimal glands, third eyelid glands and the nasolacrimal duct.
Enlarge picture
Nasolacrimal apparatus in the dog.By permission from McCurnin D, Poffenbarger EM, Small Animal Physical Diagnosis and Clinical Procedures, Saunders, 1991
lacrimal canaliculus
the lacrimal duct within the eyelid.
lacrimal caruncle
the rounded, often pigmented swelling at the medial canthus of the eye.
lacrimal cyst
congenital displacement of lacrimal tissue results in subconjunctival cysts.
lacrimal drainage system
the structures concerned with tear collection; includes lacrimal lake, puncta, canaliculi, sac and nasolacrimal duct.
lacrimal duct
there are two of these minute ducts draining tears from the conjunctiva, via the lacrimal puncta, into the lacrimal sac. Called also lacrimal canaliculus.
lacrimal duct irrigator
a 20 gauge, blunt-pointed, straight or curved cannula with a needle attachment so that it can be attached directly to a syringe nozzle.
lacrimal fossa
fossa in the medial wall of the orbital rim which houses the lacrimal sac.
lacrimal gland
contained in a pad of fat in the dorsolateral part of the orbital cavity and drains into the conjunctival sac via many excretory ducts. The secretion is largely watery tears, but in the pig is mucus. May develop adenitis.
lacrimal gland anomalies
failure of patency of the duct, supernumerary opening of the duct and ductal ectasia recorded.
lacrimal gland atrophy
part of the syndrome of keratoconjunctivitis sicca.
imperforate lacrimal puncta
see imperforate punctum.
lacrimal lake
the recess between the lids at the nasal commissure of the eye where the tears collect.
lacrimal pump
contraction of the orbiculari oculi muscle creates pressure on the lacrimal sac which causes tears to drain from the lacrimal lake.
lacrimal punctum
there is one on each eyelid close to the medial canthus. Each drains tears from the conjunctival sac into the lacrimal duct in the same eyelid. The tears then pass to the lacrimal sac and into the nasolacrimal duct. See also punctum.
lacrimal reflex
tear production caused by irritation of the cornea and conjunctiva.
lacrimal sac
the distended proximal end of the nasolacrimal duct into which the lacrimal ducts empty.
lacrimal sinus
an excavation of the lacrimal bone which communicates with the maxillary sinus in some species.
lacrimal system
see lacrimal apparatus (above).
References in periodicals archive ?
2) stated that the main level of blockage in the lacrimal system was easier to detect objectively with lacrimal scintigraphy.
Probing and silicone intubation of the lacrimal system in adults.
An obstructed lacrimal system causes epiphora and can lead to acute or chronic dacryocystitis.
Clinical success was defined as patent lacrimal system on syringing and absence of symptoms.
If the fluid is clear, then it means the dye has not gone into the lacrimal system, indicating an 'upper system' failure (vide supra) ie lacrimal pump failure, such as in facial palsy, punctal stenosis, canalicular block, or punctal eversion.
Ophthalmic investigations included syringing of the lacrimal system to demonstrate the presence of block in the lacrimal drainage system.
11) Anne Louise Bach Christensen, Pernille Oversp Hansen, suggest that endonasal DCR for both distal and prox-imal stenosis of the lacrimal system as the obstruction level seems to have no influence on the success rates.
Though it is widely known that massage of the naso lacrimal system relieves most of the cases of congenital naso lacrimal duct obstruction but correct technique of massage is either not properly demonstrated by the busy ophthalmologist or not properly understood by the parent resulting in failure and need for probing.
INTRODUCTION: Epiphora is the most bothersome complication of lacrimal system obstruction.
Failure was defined as any of the following: (1) no improvement in tearing symptoms or any episode of postoperative dacryocystitis, (2) inability to irrigate the lacrimal system postoperatively.
Here the surgical procedure do not interphere the sphincter action of the lower punctum which in turn establishes the post-op function of the lacrimal system and these results in the satisfactory recovery of the patient with no facial scar.
The lacrimal system consists of upper and lower canaliculi, a common canaliculus, lacrimal sac and nasolacrimal duct.