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Punctate
Punctum, plural puncta, adjective punctate, is an anatomical term for a sharp point or tip. It may also refer to: Medical *Lacrimal punctum, a minute opening on the margins of the eyelids that collect tears produced by the lacrimal glands *Blind spot (vision), or ''punctum cecum'', the blind spot in human vision corresponding to the location of the optic disk *Erb's point (neurology) or ''punctum nervosum'', a nerve point in the human neck *Imperforate lacrimal punctum, a congenital disorder of dogs Unrelated species named punctum *'' Allium punctum'', a species of wild onion *'' Amyna punctum'', a moth of the family Noctuidae *'' Cinguloterebra punctum'', a sea snail of the family Terebridae *'' Phylloxiphia punctum'', a moth of the family Sphingidae *'' Sepsis punctum'', a fly of the family Sepsidae *'' Zygaena punctum'', a moth of the family Zygaenidae Other * ''Punctum'' (gastropod), a genus of land snails * Punctum delens, typographic marks used to indicate deletion *N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lacrimal Punctum
The lacrimal punctum (plural ''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. Together, they function to collect tears produced by the lacrimal glands. The fluid is conveyed through the lacrimal canaliculi to the lacrimal sac, and thence via the nasolacrimal duct to the inferior nasal meatus of the nasal passage. Additional images File:Lacrimal punctum.jpg, A close up of a lacrimal punctum. File:Lower lacrimal punctum.jpg, Lower lacrimal punctum through slit lamp biomicroscope See also * Imperforate lacrimal punctum *Lacrimal apparatus The lacrimal apparatus is the physiological system containing the Orbit (anatomy), orbital structures for tears, tear production and drainage.Cassin, B. and Solomon, S. ''Dictionary of Eye Termino ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |