"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": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Mandarin terms with redundant transliterations",
          "parents": [
            "Terms with redundant transliterations",
            "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": [
        {
          "text": "The doctor said I needed glasses after I failed to read past the fourth line on the eye chart."
        }
      ],
      "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",
          "sense": "sign showing letters",
          "word": "視力表"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "shìlìbiǎo",
          "sense": "sign showing letters",
          "word": "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 entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "Mandarin terms with redundant transliterations",
        "en:Ophthalmology"
      ],
      "examples": [
        {
          "text": "The doctor said I needed glasses after I failed to read past the fourth line on the eye chart."
        }
      ],
      "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",
      "sense": "sign showing letters",
      "word": "視力表"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "shìlìbiǎo",
      "sense": "sign showing letters",
      "word": "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"
}