"Hermann grid" meaning in English

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  "etymology_text": "Named after German physiologist Ludimar Hermann (1870).",
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      "form": "Hermann grids",
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      "glosses": [
        "An optical illusion where ghostly grey blobs are perceived at the intersections of a light-coloured grid on a black background."
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          "optical illusion",
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          "intersection",
          "intersection"
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      "wikipedia": [
        "Grid illusion"
      ]
    }
  ],
  "word": "Hermann grid"
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  "etymology_text": "Named after German physiologist Ludimar Hermann (1870).",
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        "An optical illusion where ghostly grey blobs are perceived at the intersections of a light-coloured grid on a black background."
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          "intersection",
          "intersection"
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        "Grid illusion"
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  "word": "Hermann grid"
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