{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Refractive+Error&page=3",
    "query": {
      "intervention": "Refractive Error",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 75,
    "total_pages": 8,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Refractive+Error&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Refractive+Error&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-20T14:32:02.719Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT00000169",
      "title": "The Collaborative Longitudinal Evaluation of Ethnicity and Refractive Error (CLEERE) Study",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Myopia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Eye Institute (NEI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "14 Years",
        "sex": "ALL",
        "summary": "6 Years to 14 Years"
      },
      "enrollment_count": null,
      "start_date": "1999-04",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2005-06-24",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 3,
      "location_summary": "Eutaw, Alabama • Fullerton, California • Houston, Texas",
      "locations": [
        {
          "city": "Eutaw",
          "state": "Alabama"
        },
        {
          "city": "Fullerton",
          "state": "California"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00000169"
    },
    {
      "nct_id": "NCT06574646",
      "title": "Visual Acuity Outcome Differences Between the Alcon Vivity Toric IOL and RxSight LAL+",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cataract"
      ],
      "interventions": [
        {
          "name": "LAL+",
          "type": "DEVICE"
        },
        {
          "name": "Clareon Vivity Toric IOL",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "The Eye Associates",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "45 Years and older"
      },
      "enrollment_count": 250,
      "start_date": "2024-10-15",
      "completion_date": "2026-08-01",
      "has_results": false,
      "last_update_posted_date": "2024-08-28",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 1,
      "location_summary": "Bradenton, Florida",
      "locations": [
        {
          "city": "Bradenton",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06574646"
    },
    {
      "nct_id": "NCT06009458",
      "title": "Acuity 200™ (Fluoroxyfocon A) Orthokeratology Contact Lens for Overnight Wear",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Myopia"
      ],
      "interventions": [
        {
          "name": "Acuity 200™ (fluoroxyfocon A) Orthokeratology Contact Lens for Overnight Wear",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Acuity Polymers, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "7 Years and older"
      },
      "enrollment_count": 387,
      "start_date": "2023-10-01",
      "completion_date": "2025-09",
      "has_results": false,
      "last_update_posted_date": "2025-01-14",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 9,
      "location_summary": "Mission Viejo, California • Oakland, California • San Francisco, California + 6 more",
      "locations": [
        {
          "city": "Mission Viejo",
          "state": "California"
        },
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Sunnyvale",
          "state": "California"
        },
        {
          "city": "Ocoee",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06009458"
    },
    {
      "nct_id": "NCT02053688",
      "title": "Evaluation Study on Corneal Lens for Vision Correction",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Astigmatism"
      ],
      "interventions": [
        {
          "name": "Astigmatic Correction Lens (Nexis ACCL lenses)",
          "type": "DEVICE"
        },
        {
          "name": "Toric Soft Contact Lenses",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "FORSIGHT Vision3",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 40,
      "start_date": "2013-02",
      "completion_date": "2013-12",
      "has_results": false,
      "last_update_posted_date": "2014-02-04",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 6,
      "location_summary": "Fremont, California • Livermore, California • Menlo Park, California + 2 more",
      "locations": [
        {
          "city": "Fremont",
          "state": "California"
        },
        {
          "city": "Fremont",
          "state": "California"
        },
        {
          "city": "Livermore",
          "state": "California"
        },
        {
          "city": "Menlo Park",
          "state": "California"
        },
        {
          "city": "San Mateo",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02053688"
    },
    {
      "nct_id": "NCT01923675",
      "title": "Myopia:the Role of Cone Opsin Mutations & Glasses That Control Axial Elongation",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Myopia"
      ],
      "interventions": [
        {
          "name": "Spectacles with red-blocking tint",
          "type": "OTHER"
        },
        {
          "name": "Spectacles with holographic diffuser and color neutral tint",
          "type": "OTHER"
        },
        {
          "name": "Spectacles with holographic diffuser and red-blocking tint",
          "type": "OTHER"
        },
        {
          "name": "Spectacles with color neutral tint",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "13 Years",
        "sex": "ALL",
        "summary": "8 Years to 13 Years"
      },
      "enrollment_count": 0,
      "start_date": "2013-11",
      "completion_date": "2017-12",
      "has_results": false,
      "last_update_posted_date": "2019-08-14",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01923675"
    },
    {
      "nct_id": "NCT03367793",
      "title": "Spectacles for Patients With Down Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vision, Low"
      ],
      "interventions": [
        {
          "name": "Spectacles - Clinically Derived",
          "type": "DEVICE"
        },
        {
          "name": "Spectacles - Metric Technique #1 Derived",
          "type": "DEVICE"
        },
        {
          "name": "Spectacles - Metric Technique #2 Derived",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Houston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 30,
      "start_date": "2018-01-26",
      "completion_date": "2019-12-05",
      "has_results": true,
      "last_update_posted_date": "2021-10-25",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03367793"
    },
    {
      "nct_id": "NCT03222661",
      "title": "Direct Comparison of SVOne Obtained Refraction to Subjective Manifest Refraction",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Refractive Errors"
      ],
      "interventions": [
        {
          "name": "Refraction",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Smart Vision Labs",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "12 Years to 65 Years"
      },
      "enrollment_count": 200,
      "start_date": "2017-09",
      "completion_date": "2017-11",
      "has_results": false,
      "last_update_posted_date": "2017-07-19",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03222661"
    },
    {
      "nct_id": "NCT04321538",
      "title": "Gocheck Kids vs. Welch Allyn Spot Vision Screener",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Amblyopia"
      ],
      "interventions": [
        {
          "name": "Gocheck Kids",
          "type": "DEVICE"
        },
        {
          "name": "Welch Allyn Spot Vision Screener",
          "type": "DEVICE"
        },
        {
          "name": "Physical Exam",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "7 Years",
        "sex": "ALL",
        "summary": "1 Year to 7 Years"
      },
      "enrollment_count": 227,
      "start_date": "2021-02-01",
      "completion_date": "2022-12-19",
      "has_results": false,
      "last_update_posted_date": "2023-03-01",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04321538"
    },
    {
      "nct_id": "NCT01832883",
      "title": "Amblyopia and Strabismus Detection Using a Pediatric Vision Scanner",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Amblyopia",
        "Strabismus"
      ],
      "interventions": [
        {
          "name": "Pediatric Vision Scanner",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Rebiscan, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "8 Years",
        "sex": "ALL",
        "summary": "3 Years to 8 Years"
      },
      "enrollment_count": 78,
      "start_date": "2010-12",
      "completion_date": "2012-07",
      "has_results": false,
      "last_update_posted_date": "2018-04-13",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01832883"
    },
    {
      "nct_id": "NCT03592615",
      "title": "Binocular Vision Anomalies After Cataract and Refractive Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Binocular Vision Disorder",
        "Refractive Errors",
        "Cataract"
      ],
      "interventions": [
        {
          "name": "cataract surgery",
          "type": "PROCEDURE"
        },
        {
          "name": "Corneal refractive surgery",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Salus University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 51,
      "start_date": "2019-01-08",
      "completion_date": "2019-11-26",
      "has_results": false,
      "last_update_posted_date": "2020-03-18",
      "last_synced_at": "2026-10-20T14:32:02.719Z",
      "location_count": 1,
      "location_summary": "Elkins Park, Pennsylvania",
      "locations": [
        {
          "city": "Elkins Park",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03592615"
    }
  ]
}