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Anatomy of the lacrimal punctum (Video)


length: 32 seconds

In this video of the eye, you can see the punctum of the eyelid, where tears drain from the eye. The lacrimal system allows excess tears to drain from the eye into the nose … thus explaining why you get a runny nose when your eyes water.

There are a total of four puncta, found in the medial corner of both the upper and lower lids. The lower system is probably the most important for drainage, and is the first place chosen for punctal plugs in cases of dry eye.

The normal punctal opening should be slightly turned inward, pressed against the ocular surface (i.e. in a position such that the liquid tears can get in). With cases of ectropion, the eyelid is everted outward such that the pore opening is out of the tear layer, sitting out in the air. This can lead to excess eye watering and epiphora.

Download this video for powerpoint

download.gifTo download this video, right click on a link below and choose “Save Target As…”

but.gifpunctumanatomy.wmv (4.2 meg, Windows video file)
but.gifpunctumanatomy.mov (Quicktime format coming soon)

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Thumbnails (click to enlarge photo)

lowerpuncta.jpg eyepunctum.jpg



4 Comments



It is very good
Thanks



Comment by Dimitris — May 1, 2008



thank you for the hyphema video.



Comment by jasper — February 6, 2009



thank u



Comment by leenah — July 31, 2009



[...] « Anatomy of the lacrimal punctum (Video) RootAtlasIn this video of the eye, you can see the punctum of the eyelid, where tears drain from the eye. The lacrimal system allows excess tears to drain from the eye into … [...]



Pingback by Lacrimal puncta | Supernaturalro — March 30, 2012




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