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A punctal plug, also known as tear duct plug or lacrimal plug, is a small medical device that is inserted into the tear duct (puncta) of an eye to block the duct. This prevents the drainage of liquid from the eye. They are used to treat dry eye. Artificial tears are usually still required after punctal plug insertion. [1]
Tears are produced by the lacrimal gland, situated just outside the eye. Blinking the eyelids distributes the tears to keep the eyes moist, clean and lubricated. Excess tears are drained via the punctum through the tiny channels called canaliculi located on the inner side of the eyes into the tear sac, from there to the tear duct, the nose and finally down the throat.
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OTG adds a fifth pin to the standard USB connector, called the ID-pin; the micro-A plug has the ID pin grounded, while the ID in the micro-B plug is floating. A device with a micro-A plug inserted becomes an OTG A-device, and a device with a micro-B plug inserted becomes a B-device. The type of plug inserted is detected by the state of the pin ID.
Involutional stenosis is probably the most common cause of nasolacrimal duct obstruction in older people. It affects women twice as frequently as men. Although the inciting event in this process is unknown, clinicopathologic study suggests that compression of the lumen of the nasolacrimal duct is caused by inflammatory infiltrates and edema.
Prince's wand. The prince's wand (also known as a penis plug) is a piece of body piercing jewelry.It consists of a hollow tube with a threaded cap at the end. The tube is inserted into the urethra, and a stem is inserted through a Prince Albert piercing [1] and into another threaded hole on the side of the tube.
They can, however, be inserted into any piercing. In order for a plug to stay put within a piercing, the ends of its cylindrical shape are often flared out, or the plug is fastened in place by O-rings. Combinations of these two methods may also be used. A double-flared (or saddle) plug, flares outward at both ends, and is thinner towards the ...
Silicone plugs: These plugs are soft and malleable, allowing a relatively large plug to be inserted into the fistula. Once folded and inserted into the ear, they expand, stretching the earlobe. However, stretching with silicone is often a dangerous decision. It is not recommended to use silicone plugs to stretch, due to the tacky, porous surface.