"persistance rétinienne" meaning in Français

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de persistance et de rétinien."
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en français de l’ophtalmologie",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Phénomène attribuant à l’œil une image rémanente durant 1/25e de seconde sur la rétine."
      ],
      "id": "fr-persistance_rétinienne-fr-noun-JF-VoT4Y",
      "topics": [
        "ophthalmology"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pɛʁ.sis.tɑ̃s ʁe.ti.njɛn\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "persistence of vision"
    },
    {
      "lang": "Italien",
      "lang_code": "it",
      "tags": [
        "feminine"
      ],
      "word": "persistenza della visione"
    }
  ],
  "word": "persistance rétinienne"
}

{
  "categories": [
    "Compositions en français",
    "Locutions nominales en français",
    "Traductions en anglais",
    "Traductions en italien",
    "français"
  ],
  "etymology_texts": [
    "Composé de persistance et de rétinien."
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        "Lexique en français de l’ophtalmologie"
      ],
      "glosses": [
        "Phénomène attribuant à l’œil une image rémanente durant 1/25e de seconde sur la rétine."
      ],
      "topics": [
        "ophthalmology"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pɛʁ.sis.tɑ̃s ʁe.ti.njɛn\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "persistence of vision"
    },
    {
      "lang": "Italien",
      "lang_code": "it",
      "tags": [
        "feminine"
      ],
      "word": "persistenza della visione"
    }
  ],
  "word": "persistance rétinienne"
}