"Ponzo illusion" meaning in English

{
  "etymology_text": "First demonstrated by the Italian psychologist Mario Ponzo (1882–1960) in 1911.",
  "forms": [
    {
      "form": "Ponzo illusions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Ponzo illusion (plural Ponzo illusions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
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      ],
      "glosses": [
        "An optical illusion whereby a horizontal bar looks wider when farther up a picture of railroad tracks than when lower."
      ],
      "id": "en-Ponzo_illusion-en-noun-9swwlMSn",
      "links": [
        [
          "optical illusion",
          "optical illusion"
        ],
        [
          "horizontal",
          "horizontal"
        ],
        [
          "bar",
          "bar"
        ],
        [
          "wide",
          "wide"
        ],
        [
          "railroad track",
          "railroad track"
        ]
      ],
      "wikipedia": [
        "Ponzo illusion"
      ]
    }
  ],
  "word": "Ponzo illusion"
}

{
  "etymology_text": "First demonstrated by the Italian psychologist Mario Ponzo (1882–1960) in 1911.",
  "forms": [
    {
      "form": "Ponzo illusions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Ponzo illusion (plural Ponzo illusions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "An optical illusion whereby a horizontal bar looks wider when farther up a picture of railroad tracks than when lower."
      ],
      "links": [
        [
          "optical illusion",
          "optical illusion"
        ],
        [
          "horizontal",
          "horizontal"
        ],
        [
          "bar",
          "bar"
        ],
        [
          "wide",
          "wide"
        ],
        [
          "railroad track",
          "railroad track"
        ]
      ],
      "wikipedia": [
        "Ponzo illusion"
      ]
    }
  ],
  "word": "Ponzo illusion"
}