{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Refractive+Error&page=2",
    "query": {
      "intervention": "Refractive Error",
      "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=Refractive+Error&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-03T15:53:07.695Z",
  "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": "NCT03123822",
      "title": "Spectacles Lens in Concussed Kids",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Concussion, Mild",
        "Convergence Insufficiency",
        "Accommodation; Insufficiency"
      ],
      "interventions": [
        {
          "name": "Glasses",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "9 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "9 Years to 17 Years"
      },
      "enrollment_count": 10,
      "start_date": "2017-10-31",
      "completion_date": "2021-10-01",
      "has_results": true,
      "last_update_posted_date": "2022-06-23",
      "last_synced_at": "2026-09-03T15:53:07.695Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03123822"
    },
    {
      "nct_id": "NCT03358862",
      "title": "Myopia Progression With a Novel Extended Depth of Focus Contact Lens",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Myopia",
        "Myopia, Progressive"
      ],
      "interventions": [
        {
          "name": "NaturalVue Multifocal Contact Lens",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Aller, Thomas A., OD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "5 Years to 25 Years"
      },
      "enrollment_count": 80,
      "start_date": "2017-01-01",
      "completion_date": "2022-07-01",
      "has_results": false,
      "last_update_posted_date": "2021-01-12",
      "last_synced_at": "2026-09-03T15:53:07.695Z",
      "location_count": 1,
      "location_summary": "San Bruno, California",
      "locations": [
        {
          "city": "San Bruno",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03358862"
    },
    {
      "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": "2026-09-03T15:53:07.695Z",
      "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": "NCT05087563",
      "title": "Neurolens Convergence Insufficiency Study",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Binocular Vision Disorder",
        "Convergence Insufficiency",
        "Computer Vision Syndrome"
      ],
      "interventions": [
        {
          "name": "Neurolens spectacle lens",
          "type": "DEVICE"
        },
        {
          "name": "Placebo spectacle lens",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Neurolens Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 50,
      "start_date": "2021-11-22",
      "completion_date": "2022-05-31",
      "has_results": false,
      "last_update_posted_date": "2023-10-13",
      "last_synced_at": "2026-09-03T15:53:07.695Z",
      "location_count": 9,
      "location_summary": "Brea, California • Fort Collins, Colorado • Manchester, Connecticut + 6 more",
      "locations": [
        {
          "city": "Brea",
          "state": "California"
        },
        {
          "city": "Fort Collins",
          "state": "Colorado"
        },
        {
          "city": "Manchester",
          "state": "Connecticut"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Rock Rapids",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05087563"
    },
    {
      "nct_id": "NCT00574717",
      "title": "Enhancement of Emmetropization in Hyperopic Infants",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Hyperopia",
        "Hypermetropia",
        "Farsightedness"
      ],
      "interventions": [
        {
          "name": "Spectacles",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Ohio State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "8 Weeks",
        "maximum_age": "20 Weeks",
        "sex": "ALL",
        "summary": "8 Weeks to 20 Weeks"
      },
      "enrollment_count": 6,
      "start_date": "2007-12",
      "completion_date": "2010-09",
      "has_results": false,
      "last_update_posted_date": "2012-10-19",
      "last_synced_at": "2026-09-03T15:53:07.695Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00574717"
    },
    {
      "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": "2026-09-03T15:53:07.695Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04321538"
    },
    {
      "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": "2026-09-03T15:53:07.695Z",
      "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": "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": "2026-09-03T15:53:07.695Z",
      "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": "NCT05113979",
      "title": "Early Feasibility Study to Evaluate the AccuraSee in Correcting Residual Refractive Errors After Cataract Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [],
      "conditions": [
        "Refractive Errors"
      ],
      "interventions": [
        {
          "name": "AccuraSee IOPCL with +3.0D add",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "OnPoint Vision Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "22 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "22 Years and older"
      },
      "enrollment_count": 10,
      "start_date": "2020-03-09",
      "completion_date": "2022-09-09",
      "has_results": true,
      "last_update_posted_date": "2024-04-25",
      "last_synced_at": "2026-09-03T15:53:07.695Z",
      "location_count": 1,
      "location_summary": "Bloomington, Minnesota",
      "locations": [
        {
          "city": "Bloomington",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05113979"
    },
    {
      "nct_id": "NCT05611294",
      "title": "Contralateral Study of Topography Guided LASIK Versus Small Incision Lenticule Extraction",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Myopia",
        "Astigmatism"
      ],
      "interventions": [
        {
          "name": "Topography Guided LASIK Surgery",
          "type": "DEVICE"
        },
        {
          "name": "Small Incision Lenticule Extraction Surgery",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Hoopes Vision",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "22 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "22 Years to 50 Years"
      },
      "enrollment_count": 42,
      "start_date": "2022-09-27",
      "completion_date": "2025-06-01",
      "has_results": false,
      "last_update_posted_date": "2024-08-01",
      "last_synced_at": "2026-09-03T15:53:07.695Z",
      "location_count": 1,
      "location_summary": "Draper, Utah",
      "locations": [
        {
          "city": "Draper",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05611294"
    }
  ]
}