English Dictionary

punctal plug

noun

(ophthalmology) A small device that is inserted into the tear duct of an eye to block the duct, preventing the drainage of liquid from the eye.

I had a punctal plug inserted to help with my dry eyes.

意味（1）

(ophthalmology) A small device that is inserted into the tear duct of an eye to block the duct, preventing the drainage of liquid from the eye.

The punctal plug has been found useful in treating keratoconjunctivitis sicca (dry eye) and is believed to be suitable for treating other ophthalmic ailments where retention of lacrimal fluid on the surface of the eye and in the lacrimal lake is desired or where sustained release of an ophthalmic medication to the eye by using the plug as a medication carrier is desired.