"a occhio" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "at eye"
      },
      "expansion": "“at eye”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "at eye"
      },
      "expansion": "Literally, “at eye”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “at eye”.",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "prepositional phrase"
      },
      "expansion": "a occhio",
      "name": "head"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "I would say it weighs roughly fifty grams.",
          "text": "A occhio, direi che pesa cinquanta grammi.",
          "type": "example"
        }
      ],
      "glosses": [
        "by only visual observation, without measurement; roughly; by eye"
      ],
      "id": "en-a_occhio-it-prep_phrase-qH9Xur15",
      "links": [
        [
          "visual",
          "visual"
        ],
        [
          "observation",
          "observation"
        ],
        [
          "measurement",
          "measurement"
        ],
        [
          "roughly",
          "roughly"
        ],
        [
          "by eye",
          "by eye"
        ]
      ]
    }
  ],
  "word": "a occhio"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "at eye"
      },
      "expansion": "“at eye”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "at eye"
      },
      "expansion": "Literally, “at eye”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “at eye”.",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "prepositional phrase"
      },
      "expansion": "a occhio",
      "name": "head"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian multiword terms",
        "Italian prepositional phrases",
        "Italian terms with usage examples"
      ],
      "examples": [
        {
          "english": "I would say it weighs roughly fifty grams.",
          "text": "A occhio, direi che pesa cinquanta grammi.",
          "type": "example"
        }
      ],
      "glosses": [
        "by only visual observation, without measurement; roughly; by eye"
      ],
      "links": [
        [
          "visual",
          "visual"
        ],
        [
          "observation",
          "observation"
        ],
        [
          "measurement",
          "measurement"
        ],
        [
          "roughly",
          "roughly"
        ],
        [
          "by eye",
          "by eye"
        ]
      ]
    }
  ],
  "word": "a occhio"
}