"punctal plug" meaning in English

{
  "forms": [
    {
      "form": "punctal plugs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "punctal plug (plural punctal plugs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ophthalmology",
          "orig": "en:Ophthalmology",
          "parents": [
            "Medicine",
            "Vision",
            "Biology",
            "Sciences",
            "Senses",
            "All topics",
            "Perception",
            "Fundamental",
            "Body",
            "Human"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1976 April 13, Jerre M. Freeman, Punctum plug and method for treating keratoconjunctivitis sicca (dry eye) and other ophthalmic aliments using same, US Patent 3949750 (PDF version)",
          "text": "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.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "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."
      ],
      "id": "en-punctal_plug-en-noun-WvQ61q22",
      "links": [
        [
          "ophthalmology",
          "ophthalmology"
        ],
        [
          "tear duct",
          "tear duct"
        ],
        [
          "eye",
          "eye"
        ],
        [
          "drainage",
          "drainage"
        ],
        [
          "liquid",
          "liquid"
        ]
      ],
      "raw_glosses": [
        "(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."
      ],
      "related": [
        {
          "word": "punctum"
        }
      ],
      "synonyms": [
        {
          "word": "tear duct plug"
        },
        {
          "word": "lacrimal plug"
        }
      ],
      "topics": [
        "medicine",
        "ophthalmology",
        "sciences"
      ]
    }
  ],
  "word": "punctal plug"
}

{
  "forms": [
    {
      "form": "punctal plugs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "punctal plug (plural punctal plugs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "punctum"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:Ophthalmology"
      ],
      "examples": [
        {
          "ref": "1976 April 13, Jerre M. Freeman, Punctum plug and method for treating keratoconjunctivitis sicca (dry eye) and other ophthalmic aliments using same, US Patent 3949750 (PDF version)",
          "text": "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.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "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."
      ],
      "links": [
        [
          "ophthalmology",
          "ophthalmology"
        ],
        [
          "tear duct",
          "tear duct"
        ],
        [
          "eye",
          "eye"
        ],
        [
          "drainage",
          "drainage"
        ],
        [
          "liquid",
          "liquid"
        ]
      ],
      "raw_glosses": [
        "(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."
      ],
      "topics": [
        "medicine",
        "ophthalmology",
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "tear duct plug"
    },
    {
      "word": "lacrimal plug"
    }
  ],
  "word": "punctal plug"
}