"occular spark" meaning in English

{
  "forms": [
    {
      "form": "occular sparks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "occular spark (plural occular sparks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ichthyology",
          "orig": "en:Ichthyology",
          "parents": [
            "Zoology",
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A type of occular radiance, which is the redirection of infalling light from above, reflecting it into the visual field to illuminate the field of vision, for diurnal active photolocation."
      ],
      "hypernyms": [
        {
          "word": "occular radiance"
        }
      ],
      "id": "en-occular_spark-en-noun-cgMABd0L",
      "links": [
        [
          "ichthyology",
          "ichthyology"
        ],
        [
          "occular radiance",
          "occular radiance"
        ],
        [
          "active photolocation",
          "active photolocation"
        ]
      ],
      "raw_glosses": [
        "(ichthyology) A type of occular radiance, which is the redirection of infalling light from above, reflecting it into the visual field to illuminate the field of vision, for diurnal active photolocation."
      ],
      "topics": [
        "biology",
        "ichthyology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "occular spark"
}

{
  "forms": [
    {
      "form": "occular sparks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "occular spark (plural occular sparks)",
      "name": "en-noun"
    }
  ],
  "hypernyms": [
    {
      "word": "occular radiance"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Ichthyology"
      ],
      "glosses": [
        "A type of occular radiance, which is the redirection of infalling light from above, reflecting it into the visual field to illuminate the field of vision, for diurnal active photolocation."
      ],
      "links": [
        [
          "ichthyology",
          "ichthyology"
        ],
        [
          "occular radiance",
          "occular radiance"
        ],
        [
          "active photolocation",
          "active photolocation"
        ]
      ],
      "raw_glosses": [
        "(ichthyology) A type of occular radiance, which is the redirection of infalling light from above, reflecting it into the visual field to illuminate the field of vision, for diurnal active photolocation."
      ],
      "topics": [
        "biology",
        "ichthyology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "occular spark"
}