{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Refractive+Error",
    "query": {
      "intervention": "Refractive Error"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 74,
    "total_pages": 8,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Refractive+Error&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-02T20:40:17.398Z",
  "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": "NCT03021707",
      "title": "Early Feasibility Study of UV-Femtosecond Laser Assisted Lenticular Extraction",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Refractive Error - Myopia Severe",
        "Refractive Error - Myopia Simple"
      ],
      "interventions": [
        {
          "name": "WaveLight® Ultraviolet Femtosecond (FS) Laser System",
          "type": "DEVICE"
        },
        {
          "name": "Laser Assisted Lenticular Extraction",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE"
      ],
      "sponsor": "Alcon Research",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "22 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "22 Years and older"
      },
      "enrollment_count": 7,
      "start_date": "2017-03-07",
      "completion_date": "2019-10-17",
      "has_results": false,
      "last_update_posted_date": "2022-04-07",
      "last_synced_at": "2026-09-02T20:40:17.398Z",
      "location_count": 2,
      "location_summary": "Sioux Falls, South Dakota • Houston, Texas",
      "locations": [
        {
          "city": "Sioux Falls",
          "state": "South Dakota"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03021707"
    },
    {
      "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": "2026-09-02T20:40:17.398Z",
      "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": "NCT03326869",
      "title": "A Study Raindrop Near Vision Inlay in Presbyopes Implanted in Corneal Pockets",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Presbyopia"
      ],
      "interventions": [
        {
          "name": "Raindrop Near Vision Inlay",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Eye Center of North Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "41 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "41 Years to 65 Years"
      },
      "enrollment_count": 2,
      "start_date": "2017-10-18",
      "completion_date": "2018-10-23",
      "has_results": true,
      "last_update_posted_date": "2020-08-10",
      "last_synced_at": "2026-09-02T20:40:17.398Z",
      "location_count": 1,
      "location_summary": "Panama City, Florida",
      "locations": [
        {
          "city": "Panama City",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03326869"
    },
    {
      "nct_id": "NCT01300949",
      "title": "Spaeth/Richman Contrast Sensitivity Test",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Glaucoma"
      ],
      "interventions": [
        {
          "name": "Spaeth/Richman Contrast Sensitivity Test",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Pelli-Robson Contrast Sensitivity Chart",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Wills Eye",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 314,
      "start_date": "2010-01",
      "completion_date": "2014-04",
      "has_results": true,
      "last_update_posted_date": "2018-12-11",
      "last_synced_at": "2026-09-02T20:40:17.398Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01300949"
    },
    {
      "nct_id": "NCT05259163",
      "title": "LFR-260 vs Traditional Phoropter in Visual Acuity Testing",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Visual Acuity",
        "Astigmatism",
        "Anisometropia"
      ],
      "interventions": [
        {
          "name": "LFR-260 portable phoropter",
          "type": "DEVICE"
        },
        {
          "name": "Traditional phoropter (SOC)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Evolution Optiks Limited",
      "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": 112,
      "start_date": "2022-06-07",
      "completion_date": "2023-01-06",
      "has_results": true,
      "last_update_posted_date": "2024-09-25",
      "last_synced_at": "2026-09-02T20:40:17.398Z",
      "location_count": 2,
      "location_summary": "Worcester, Massachusetts • Oyster Bay, New York",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        },
        {
          "city": "Oyster Bay",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05259163"
    },
    {
      "nct_id": "NCT03929588",
      "title": "Study of a Hand-held Device Plus Mobile App Versus Standard Eye Care Devices in Measuring Refractive Error of the Eye",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Refractive Errors",
        "Astigmatism"
      ],
      "interventions": [
        {
          "name": "Hand-held device supported by a mobile application",
          "type": "DEVICE"
        },
        {
          "name": "Phoropter",
          "type": "DEVICE"
        },
        {
          "name": "Autorefractor",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "EyeQue Corp.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "30 Years to 65 Years"
      },
      "enrollment_count": 230,
      "start_date": "2019-05-07",
      "completion_date": "2020-03-31",
      "has_results": true,
      "last_update_posted_date": "2022-03-24",
      "last_synced_at": "2026-09-02T20:40:17.398Z",
      "location_count": 1,
      "location_summary": "Inglewood, California",
      "locations": [
        {
          "city": "Inglewood",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03929588"
    },
    {
      "nct_id": "NCT07227714",
      "title": "Effect of Vision Centers on Access to Eye Care and Eye Health Outcomes",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cataract Surgery",
        "Eye Care",
        "Glasses",
        "Primary Eye Care",
        "Vision Center",
        "Eyecare Visits"
      ],
      "interventions": [
        {
          "name": "Establishment of a vision center",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 150000,
      "start_date": "2026-08-01",
      "completion_date": "2028-12-01",
      "has_results": false,
      "last_update_posted_date": "2026-06-30",
      "last_synced_at": "2026-09-02T20:40:17.398Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07227714"
    },
    {
      "nct_id": "NCT00212134",
      "title": "Infant Aphakia Treatment Study (IATS)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Congenital Cataract"
      ],
      "interventions": [
        {
          "name": "Contact lens correction of aphakia",
          "type": "DEVICE"
        },
        {
          "name": "Intraocular lens implantation",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "28 Days",
        "maximum_age": "210 Days",
        "sex": "ALL",
        "summary": "28 Days to 210 Days"
      },
      "enrollment_count": 114,
      "start_date": "2004-12",
      "completion_date": "2020-08-31",
      "has_results": true,
      "last_update_posted_date": "2024-07-24",
      "last_synced_at": "2026-09-02T20:40:17.398Z",
      "location_count": 13,
      "location_summary": "Palo Alto, California • Miami, Florida • Atlanta, Georgia + 10 more",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00212134"
    },
    {
      "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": "2026-09-02T20:40:17.398Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01923675"
    },
    {
      "nct_id": "NCT07571538",
      "title": "VisionApp - Ghosting",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Diplopia, Monocular"
      ],
      "interventions": [
        {
          "name": "Proclear 1 Day Contact Lens",
          "type": "DEVICE"
        },
        {
          "name": "MyDay Contact Lens",
          "type": "DEVICE"
        },
        {
          "name": "NaturalVue Contact Lens",
          "type": "DEVICE"
        },
        {
          "name": "MiSight 1 Day Contact Lens",
          "type": "DEVICE"
        },
        {
          "name": "Investigational Contact Lens",
          "type": "DEVICE"
        },
        {
          "name": "VisionApp",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "8 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2025-10-10",
      "completion_date": "2026-12-01",
      "has_results": false,
      "last_update_posted_date": "2026-08-24",
      "last_synced_at": "2026-09-02T20:40:17.398Z",
      "location_count": 1,
      "location_summary": "Bloomington, Indiana",
      "locations": [
        {
          "city": "Bloomington",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07571538"
    }
  ]
}