"gravel-blind" meaning in English

{
  "etymology_text": "By analogy with sand-blind (\"partly blind\") and stone-blind (\"entirely blind\"), with the latter also formed by analogy.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "gravel-blind (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "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": "topical",
          "langcode": "en",
          "name": "Vision",
          "orig": "en:Vision",
          "parents": [
            "Senses",
            "Perception",
            "Body",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1942 October 3, John Ware, “Nomenclature of Night Blindness”, in British Medical Journal, volume 2, number 4265, →PMID, page 409",
          "text": "A deaf man may be anything from hard of hearing to as deaf as a post; a blind man may be as blind as a bat or an owl; he may be gravel-blind or stone-blind; a bald man as bald as a coot or as a billiard ball.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "More than partially blind, but not completely blind."
      ],
      "id": "en-gravel-blind-en-adj-MsB-0jlu",
      "links": [
        [
          "blind",
          "blind"
        ]
      ],
      "related": [
        {
          "word": "sand-blind"
        },
        {
          "word": "stone-blind"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "gravel-blind"
}

{
  "etymology_text": "By analogy with sand-blind (\"partly blind\") and stone-blind (\"entirely blind\"), with the latter also formed by analogy.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "gravel-blind (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "sand-blind"
    },
    {
      "word": "stone-blind"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "English uncomparable adjectives",
        "en:Vision"
      ],
      "examples": [
        {
          "ref": "1942 October 3, John Ware, “Nomenclature of Night Blindness”, in British Medical Journal, volume 2, number 4265, →PMID, page 409",
          "text": "A deaf man may be anything from hard of hearing to as deaf as a post; a blind man may be as blind as a bat or an owl; he may be gravel-blind or stone-blind; a bald man as bald as a coot or as a billiard ball.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "More than partially blind, but not completely blind."
      ],
      "links": [
        [
          "blind",
          "blind"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "gravel-blind"
}