lacrimal apparatus

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lacrimal apparatus

[′lak·rə·məl ‚ap·ə′rad·əs]
(anatomy)
The functional and structural mechanisms for secreting and draining tears; includes the lacrimal gland, lake, puncta, canaliculi, sac, and nasolacrimal duct.
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In two of these 4 eyes, the etiology was idiopathic canalicular obstruction, in one eye lacrimal sac excision due to tumor excision and in one eye upper and middle lacrimal system damage secondary to laser DCR; this difference was statistically significant (P = 0.029).
Among the 6 operated lacrimal systems of these patients, 5 lacrimal systems with postsac obstruction had successful outcomes (83.3%); 1 lacrimal system with presac obstruction had an unsuccessful outcome (16.7%).
Congenital lacrimal system anomalies other than nasolacrimal duct obstruction are uncommon.
None of the cysts were connected to the nasolacrimal duct, and all showed patency of the lacrimal system on syringing after cyst removal, with no evidence of any leakage to the surgical site.
Endoscopic endonasal DCR overcomes all the drawbacks of external DCR namely external facial scar, impairment of pumping action of lacrimal system, distortion of medial canthus anatomy, inability to treat coexisting sinonasal diseases or anatomical compression of nasolacrimal system, it also avoids scarring and adhesions.
Findings associated with dacryocystocele are irreversible fibrotic narrowing in the lacrimal system, osseous changes in the nasolacrimal duct and chronic and low-grade inflammation [1].
Dacryoliths are calculi of the lacrimal system observed incidentally during dacryocystorhinostomy.
Saxena (ophthalmology, CSM Medical U., India) brings together ophthalmologists mostly from India to cover major ophthalmological issues common to everyday practice, and the diagnosis and management--including surgical procedures--of corneal and external diseases; glaucoma; cataracts; uveitis; vitreoretinal diseases; diseases of the optic nerve, lid, orbit, and lacrimal system; strabismus; and trauma.
They are normally seen in the major salivary glands, the lacrimal system, and the thyroid gland.
In the present study overall the disorders of ocular muscles, binocular movement, accommodation and refraction was the most common (37.25%) followed by Disorders of Conjunctiva (25.75%), Congenital malformations of eye (7%), Disorders of eyelid, Lacrimal system and orbit (6.50%), Injury of eye and orbit (3%), Superficial injury of eye (1.50%), Disorders of sclera, cornea, iris and ciliary body (1%), Disorders of choroid and retina (0.75%) and Presence of functional implant (IOL) (0.5%).
An obstructed lacrimal system causes epiphora and can lead to acute or chronic dacryocystitis.