{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Refraction&page=2",
    "query": {
      "intervention": "Refraction",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Refraction&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-04T10:32:24.572Z",
  "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": "NCT04249505",
      "title": "Refractive Accuracy of \"2WIN\" and Portable Autorefractors",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Refractive Error - Myopia Axial",
        "Astigmatism",
        "Accomodation",
        "Visual Impairment",
        "Hyperopia of Both Eyes"
      ],
      "interventions": [
        {
          "name": "\"2WIN\" Photoscreener",
          "type": "DEVICE"
        },
        {
          "name": "\"Plusoptix A12\"",
          "type": "DEVICE"
        },
        {
          "name": "\"Retinomax\"",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Alaska Blind Child Discovery",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "95 Years",
        "sex": "ALL",
        "summary": "6 Months to 95 Years"
      },
      "enrollment_count": 708,
      "start_date": "2020-01-09",
      "completion_date": "2021-04-01",
      "has_results": false,
      "last_update_posted_date": "2021-07-23",
      "last_synced_at": "2026-09-04T10:32:24.572Z",
      "location_count": 1,
      "location_summary": "Anchorage, Alaska",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04249505"
    },
    {
      "nct_id": "NCT03502863",
      "title": "Clinical Study to Evaluate Effectiveness of Digital Refraction",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Myopia",
        "Astigmatism"
      ],
      "interventions": [
        {
          "name": "Digital refraction",
          "type": "DEVICE"
        },
        {
          "name": "Manual Refraction",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "OTHER"
      ],
      "sponsor": "Visibly",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "22 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "22 Years to 55 Years"
      },
      "enrollment_count": 102,
      "start_date": "2018-04-19",
      "completion_date": "2018-07-06",
      "has_results": false,
      "last_update_posted_date": "2018-10-26",
      "last_synced_at": "2026-09-04T10:32:24.572Z",
      "location_count": 3,
      "location_summary": "Fort Lauderdale, Florida • Nashville, Tennessee • Harlingen, Texas",
      "locations": [
        {
          "city": "Fort Lauderdale",
          "state": "Florida"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        },
        {
          "city": "Harlingen",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03502863"
    },
    {
      "nct_id": "NCT03222037",
      "title": "Evaluation of Electronic LogMar Visual Acuity and Contrast Sensitivity in a Population of Contact Lens Wearers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Visual Acuity"
      ],
      "interventions": [
        {
          "name": "senofilcon A",
          "type": "DEVICE"
        },
        {
          "name": "Control",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Johnson & Johnson Vision Care, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 49,
      "start_date": "2017-06-27",
      "completion_date": "2017-08-04",
      "has_results": true,
      "last_update_posted_date": "2019-09-10",
      "last_synced_at": "2026-09-04T10:32:24.572Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03222037"
    },
    {
      "nct_id": "NCT00950924",
      "title": "Optical Defocus to Stimulate Eye Elongation in Hyperopia",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hyperopia",
        "Refractive Error"
      ],
      "interventions": [
        {
          "name": "Simultaneous Vision Bifocal Soft Contact Lenses",
          "type": "DEVICE"
        },
        {
          "name": "Single Vision Soft Contact Lenses",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Aller, Thomas A., OD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "12 Years",
        "sex": "ALL",
        "summary": "5 Years to 12 Years"
      },
      "enrollment_count": 30,
      "start_date": "2015-01",
      "completion_date": "2022-01-01",
      "has_results": false,
      "last_update_posted_date": "2021-01-12",
      "last_synced_at": "2026-09-04T10:32:24.572Z",
      "location_count": 1,
      "location_summary": "San Bruno, California",
      "locations": [
        {
          "city": "San Bruno",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00950924"
    },
    {
      "nct_id": "NCT03668067",
      "title": "Performance of 2WIN Photoscreener With Corneal Reflex Compared to School Bus Retinoscopy by AAPOS Guidelines",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Refractive Errors",
        "Amblyopia",
        "Strabismus",
        "Development Delay"
      ],
      "interventions": [
        {
          "name": "2WIN photoscreener",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Alaska Blind Child Discovery",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Week",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "1 Week to 90 Years"
      },
      "enrollment_count": 471,
      "start_date": "2018-04-02",
      "completion_date": "2018-10-31",
      "has_results": false,
      "last_update_posted_date": "2024-01-30",
      "last_synced_at": "2026-09-04T10:32:24.572Z",
      "location_count": 1,
      "location_summary": "Anchorage, Alaska",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03668067"
    },
    {
      "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": "2026-09-04T10:32:24.572Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03367793"
    },
    {
      "nct_id": "NCT05464732",
      "title": "Vivity IOL: Emmetropia Compared to Monovision.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Presbyopia"
      ],
      "interventions": [
        {
          "name": "Vivity IOL emmetropia",
          "type": "DEVICE"
        },
        {
          "name": "Vivity IOL monovision",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Carolina Eyecare Physicians, LLC",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 33,
      "start_date": "2020-09-03",
      "completion_date": "2022-08-30",
      "has_results": true,
      "last_update_posted_date": "2025-03-24",
      "last_synced_at": "2026-09-04T10:32:24.572Z",
      "location_count": 1,
      "location_summary": "Mt. Pleasant, South Carolina",
      "locations": [
        {
          "city": "Mt. Pleasant",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05464732"
    },
    {
      "nct_id": "NCT05049070",
      "title": "Study to Evaluate the Reliability, Validity and Safety of Subjective Mobile Refraction",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Refractive Errors"
      ],
      "interventions": [
        {
          "name": "Mobile medical application to self administer a subjective refraction test",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Standard of care refraction test",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "1800 Contacts, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "39 Years",
        "sex": "ALL",
        "summary": "18 Years to 39 Years"
      },
      "enrollment_count": 349,
      "start_date": "2021-09-15",
      "completion_date": "2023-06",
      "has_results": false,
      "last_update_posted_date": "2023-04-06",
      "last_synced_at": "2026-09-04T10:32:24.572Z",
      "location_count": 12,
      "location_summary": "Beverly Hills, California • Petaluma, California • Pomona, California + 9 more",
      "locations": [
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Petaluma",
          "state": "California"
        },
        {
          "city": "Pomona",
          "state": "California"
        },
        {
          "city": "Delray Beach",
          "state": "Florida"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05049070"
    },
    {
      "nct_id": "NCT03082599",
      "title": "Symfony Toric Intraocular Lens Visual Outcomes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cataract Bilateral",
        "Astigmatism Bilateral"
      ],
      "interventions": [
        {
          "name": "Presbyopia and astigmatism correcting intraocular lens",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Carolina Eyecare Physicians, LLC",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "40 Years to 99 Years"
      },
      "enrollment_count": 120,
      "start_date": "2017-02-17",
      "completion_date": "2018-04-03",
      "has_results": true,
      "last_update_posted_date": "2020-01-27",
      "last_synced_at": "2026-09-04T10:32:24.572Z",
      "location_count": 4,
      "location_summary": "Stillwater, Minnesota • Garden City, New York • Mt. Pleasant, South Carolina + 1 more",
      "locations": [
        {
          "city": "Stillwater",
          "state": "Minnesota"
        },
        {
          "city": "Garden City",
          "state": "New York"
        },
        {
          "city": "Mt. Pleasant",
          "state": "South Carolina"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03082599"
    },
    {
      "nct_id": "NCT07087665",
      "title": "Patient Reported Outcomes With WaveLight Plus LASIK",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Myopia"
      ],
      "interventions": [
        {
          "name": "Wavelight Plus",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "OVO LASIK + Lens",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "37 Years",
        "sex": "ALL",
        "summary": "18 Years to 37 Years"
      },
      "enrollment_count": 60,
      "start_date": "2025-07-24",
      "completion_date": "2026-05-18",
      "has_results": false,
      "last_update_posted_date": "2026-07-30",
      "last_synced_at": "2026-09-04T10:32:24.572Z",
      "location_count": 1,
      "location_summary": "Saint Louis Park, Minnesota",
      "locations": [
        {
          "city": "Saint Louis Park",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07087665"
    }
  ]
}