types of punctal plugs
A punctal plug is a very tiny, bio-compatible device that is inserted into the tear ducts to block drainage. Once inserted into the tear ducts, punctal plugs increase the eyeâs tear film and surface moisture to relieve dry eyes. No larger than a grain of rice, punctal plugs are also known as; punctum plugs, occluders, and lacrimal plugs. There are two types of punctal plugs: semi-permanent and dissolvable. Semi-permanent punctal plugs are typically made of long-lasting materials such as silicone; whereas dissolvable plugs are made of materials that eventually absorb such as collagen, and usually last from a few days to several months.