"eye chart" meaning in English

{
  "forms": [
    {
      "form": "eye charts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "eye chart (plural eye charts)",
      "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": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Mandarin terms with redundant transliterations",
          "parents": [
            "Terms with redundant transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Mandarin translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ophthalmology",
          "orig": "en:Ophthalmology",
          "parents": [
            "Medicine",
            "Vision",
            "Biology",
            "Healthcare",
            "Senses",
            "Sciences",
            "Health",
            "Perception",
            "All topics",
            "Body",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "The doctor said I needed glasses after I failed to read past the fourth line on the eye chart.",
          "type": "example"
        }
      ],
      "glosses": [
        "A sign or poster showing letters or symbols in progressively smaller lines of type, used to test distance vision."
      ],
      "id": "en-eye_chart-en-noun-Ji929K86",
      "links": [
        [
          "sign",
          "sign"
        ],
        [
          "poster",
          "poster"
        ],
        [
          "letters",
          "letters"
        ],
        [
          "symbols",
          "symbols"
        ],
        [
          "type",
          "type"
        ],
        [
          "distance",
          "distance"
        ],
        [
          "vision",
          "vision"
        ]
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "shìlìbiǎo",
          "sense": "sign showing letters",
          "word": "視力表 /视力表"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "sign showing letters",
          "word": "näkötaulu"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "sign showing letters",
          "tags": [
            "masculine"
          ],
          "word": "tableau de vue"
        }
      ]
    }
  ],
  "word": "eye chart"
}

{
  "forms": [
    {
      "form": "eye charts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "eye chart (plural eye charts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with usage examples",
        "Entries with translation boxes",
        "Mandarin terms with redundant transliterations",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with French translations",
        "Terms with Mandarin translations",
        "en:Ophthalmology"
      ],
      "examples": [
        {
          "text": "The doctor said I needed glasses after I failed to read past the fourth line on the eye chart.",
          "type": "example"
        }
      ],
      "glosses": [
        "A sign or poster showing letters or symbols in progressively smaller lines of type, used to test distance vision."
      ],
      "links": [
        [
          "sign",
          "sign"
        ],
        [
          "poster",
          "poster"
        ],
        [
          "letters",
          "letters"
        ],
        [
          "symbols",
          "symbols"
        ],
        [
          "type",
          "type"
        ],
        [
          "distance",
          "distance"
        ],
        [
          "vision",
          "vision"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "shìlìbiǎo",
      "sense": "sign showing letters",
      "word": "視力表 /视力表"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "sign showing letters",
      "word": "näkötaulu"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "sign showing letters",
      "tags": [
        "masculine"
      ],
      "word": "tableau de vue"
    }
  ],
  "word": "eye chart"
}