"eye level" meaning in English

{
  "forms": [
    {
      "form": "eye levels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "eye level (countable and uncountable, plural eye levels)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "1962 June, David Walters, “The new station and layout at Coventry”, in Modern Railways, page 407",
          "text": "The illuminated diagram is arranged upright, at eye level, in which position it can be seen clearly from the desks of the traffic regulator and station announcer (who also commands a good view of the station platforms).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A level at the height of one's eyes."
      ],
      "id": "en-eye_level-en-noun-vYqJ5mPq",
      "tags": [
        "countable",
        "uncountable"
      ],
      "translations": [
        {
          "code": "da",
          "lang": "Danish",
          "sense": "a level at the height of one's eyes",
          "tags": [
            "common-gender"
          ],
          "word": "øjenhøjde"
        }
      ]
    }
  ],
  "word": "eye level"
}

{
  "forms": [
    {
      "form": "eye levels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "eye level (countable and uncountable, plural eye levels)",
      "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 quotations",
        "English uncountable nouns"
      ],
      "examples": [
        {
          "ref": "1962 June, David Walters, “The new station and layout at Coventry”, in Modern Railways, page 407",
          "text": "The illuminated diagram is arranged upright, at eye level, in which position it can be seen clearly from the desks of the traffic regulator and station announcer (who also commands a good view of the station platforms).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A level at the height of one's eyes."
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "translations": [
    {
      "code": "da",
      "lang": "Danish",
      "sense": "a level at the height of one's eyes",
      "tags": [
        "common-gender"
      ],
      "word": "øjenhøjde"
    }
  ],
  "word": "eye level"
}