"optotype" meaning in English

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "optotypic"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "opto",
        "3": "type"
      },
      "expansion": "opto- + -type",
      "name": "confix"
    }
  ],
  "etymology_text": "From opto- + -type.",
  "forms": [
    {
      "form": "optotypes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "optotype (plural optotypes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "text": "Optotypes can be specially shaped letters, numbers, or geometric symbols.",
          "type": "example"
        }
      ],
      "glosses": [
        "A standardized symbol for testing vision."
      ],
      "id": "en-optotype-en-noun-LBt54xsa",
      "links": [
        [
          "standardize",
          "standardize"
        ],
        [
          "symbol",
          "symbol"
        ],
        [
          "test",
          "test"
        ],
        [
          "vision",
          "vision"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "3 97",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "22 78",
          "kind": "other",
          "name": "English terms prefixed with opto-",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "8 92",
          "kind": "other",
          "name": "English terms suffixed with -type",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "3 97",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "3 97",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "An eye chart"
      ],
      "id": "en-optotype-en-noun-rYQxDVMU",
      "links": [
        [
          "eye chart",
          "eye chart"
        ]
      ]
    }
  ],
  "wikipedia": [
    "optotype"
  ],
  "word": "optotype"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English terms prefixed with opto-",
    "English terms suffixed with -type",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "derived": [
    {
      "word": "optotypic"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "opto",
        "3": "type"
      },
      "expansion": "opto- + -type",
      "name": "confix"
    }
  ],
  "etymology_text": "From opto- + -type.",
  "forms": [
    {
      "form": "optotypes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "optotype (plural optotypes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "Optotypes can be specially shaped letters, numbers, or geometric symbols.",
          "type": "example"
        }
      ],
      "glosses": [
        "A standardized symbol for testing vision."
      ],
      "links": [
        [
          "standardize",
          "standardize"
        ],
        [
          "symbol",
          "symbol"
        ],
        [
          "test",
          "test"
        ],
        [
          "vision",
          "vision"
        ]
      ]
    },
    {
      "glosses": [
        "An eye chart"
      ],
      "links": [
        [
          "eye chart",
          "eye chart"
        ]
      ]
    }
  ],
  "wikipedia": [
    "optotype"
  ],
  "word": "optotype"
}