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The lacrimal punctum (pl.: puncta) or lacrimal point is a minute opening on the summits of the lacrimal papillae, seen on the margins of the eyelids at the lateral extremity of the lacrimal lake. There are two lacrimal puncta in the medial (inside) portion of each eyelid. Normally, the puncta dip into the lacrimal lake.
Pages in category "Disorders of eyelid, lacrimal system and orbit" The following 23 pages are in this category, out of 23 total. This list may not reflect recent changes .
Dacryocystitis is an infection of the lacrimal sac, secondary to obstruction of the nasolacrimal duct at the junction of the lacrimal sac. [1] The term derives from Greek dákryon 'tear' cysta 'sac' and -itis 'inflammation'. [2] It causes pain, redness, and swelling over the inner aspect of the lower eyelid and epiphora.
Punctoplasty is a surgical procedure to restore proper drainage of tears [1] when the lacrimal punctum (puncta lacrimalia) becomes blocked in one or both eyes.. If a blockage is present in the puncta, doctors may suggest a procedure called punctoplasty, performed to widen the drain opening.
The lacrimal papilla is the small rise in the bottom (inferior) and top (superior) eyelid just before it ends at the corner of the eye closest to the nose. At the medial edge of it is the lacrimal punctum, a small hole that lets tears drain into the inside of the nose through the lacrimal canaliculi.
Along the inner margin of the tarsus are modified sebaceous glands known as tarsal glands (or meibomian glands), aligned vertically within the tarsi: 30 to 40 glands in the upper lid, and 20 to 30 in the lower lid, which secrete a lipid-rich product which helps keep the lacrimal secretions or tears from evaporating too quickly, thus keeping the ...
There are approximately forty Krause glands in the region of the upper eyelid, and around 6 to 8 in the region of the lower lid. [2] The function of these glands are to produce tears which are secreted onto the surface of the conjunctiva. There are rare instances of tumors associated with Krause's glands.
Although the lacrimal lake usually contains 7–10 μL of tears, the maximum fluid it can usually hold is 25–30 μL before tearing occurs. Aging usually causes the eyelids to become more loose which in turn enables the lacrimal lake to hold even more fluid. The lacrimal papilla is an elevation located on the medial canthus where the punctum ...