"opto-" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "ὀπτικός",
        "4": "",
        "5": "of seeing"
      },
      "expansion": "Ancient Greek ὀπτικός (optikós, “of seeing”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek ὀπτικός (optikós, “of seeing”).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "opto-",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "opto-",
      "name": "en-prefix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Irish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Italian translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "optical"
      ],
      "id": "en-opto--en-prefix-FplSHlyB",
      "links": [
        [
          "optical",
          "optical"
        ]
      ],
      "tags": [
        "morpheme"
      ],
      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "word": "opto-"
        },
        {
          "code": "ga",
          "lang": "Irish",
          "sense": "Translations",
          "word": "opta-"
        },
        {
          "code": "it",
          "lang": "Italian",
          "sense": "Translations",
          "word": "opto-"
        }
      ]
    }
  ],
  "word": "opto-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "ὀπτικός",
        "4": "",
        "5": "of seeing"
      },
      "expansion": "Ancient Greek ὀπτικός (optikós, “of seeing”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek ὀπτικός (optikós, “of seeing”).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "opto-",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "opto-",
      "name": "en-prefix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English prefixes",
        "English terms derived from Ancient Greek",
        "Entries with translation boxes",
        "Pages with 2 entries",
        "Pages with entries",
        "Terms with French translations",
        "Terms with Irish translations",
        "Terms with Italian translations",
        "Translation table header lacks gloss"
      ],
      "glosses": [
        "optical"
      ],
      "links": [
        [
          "optical",
          "optical"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "word": "opto-"
    },
    {
      "code": "ga",
      "lang": "Irish",
      "sense": "Translations",
      "word": "opta-"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "Translations",
      "word": "opto-"
    }
  ],
  "word": "opto-"
}