{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Visual+Acuity&page=4",
    "query": {
      "intervention": "Visual Acuity",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 242,
    "total_pages": 25,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Visual+Acuity&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Visual+Acuity&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-18T05:48:40.700Z",
  "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": "NCT03212222",
      "title": "Cell Phone Application for Vision Assessment",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Visual Impairment"
      ],
      "interventions": [
        {
          "name": "Peek Acuity",
          "type": "OTHER"
        },
        {
          "name": "Standard Visual Screening",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "3 Years to 18 Years"
      },
      "enrollment_count": 111,
      "start_date": "2017-08-25",
      "completion_date": "2017-12-15",
      "has_results": false,
      "last_update_posted_date": "2019-06-28",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03212222"
    },
    {
      "nct_id": "NCT01191502",
      "title": "Comparative Study of Photopic and Mesopic Distance, Intermediate and Near Visual Acuity, and Spectacle Independence",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Visual Acuity"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Innovative Medical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2010-01",
      "completion_date": "2011-09",
      "has_results": false,
      "last_update_posted_date": "2011-10-06",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 1,
      "location_summary": "Eugene, Oregon",
      "locations": [
        {
          "city": "Eugene",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01191502"
    },
    {
      "nct_id": "NCT01028937",
      "title": "Hyperopia Correction Using the NTK Optimal Keratoplasty (Opti-K) System",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hyperopia"
      ],
      "interventions": [
        {
          "name": "Optimal Keratoplasty",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "NTK Enterprises, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 6,
      "start_date": "2009-12",
      "completion_date": "2018-01",
      "has_results": true,
      "last_update_posted_date": "2019-05-09",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01028937"
    },
    {
      "nct_id": "NCT04391166",
      "title": "Validity of at Home Visual Acuity Measurements for Telemedicine During Corona Virus (COVID-19) Pandemic",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Visual Impairment"
      ],
      "interventions": [
        {
          "name": "Non invasive visual acuity testing",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 108,
      "start_date": "2020-05-20",
      "completion_date": "2020-12-01",
      "has_results": false,
      "last_update_posted_date": "2021-03-23",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04391166"
    },
    {
      "nct_id": "NCT06981156",
      "title": "Evaluation of the Neurologic Assessment in Pediatric Neuro-Oncology (pNANO)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pediatric Brain Tumor",
        "Pediatric Spine Tumor"
      ],
      "interventions": [
        {
          "name": "pNANO Assessment",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "1 Year to 17 Years"
      },
      "enrollment_count": 252,
      "start_date": "2025-05-13",
      "completion_date": "2027-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-21",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 1,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06981156"
    },
    {
      "nct_id": "NCT01226628",
      "title": "A Safety Study of CNTO 2476 in Patients With Age-Related Macular Degeneration",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Age-related Macular Degeneration"
      ],
      "interventions": [
        {
          "name": "CNTO 2476",
          "type": "BIOLOGICAL"
        },
        {
          "name": "iTrack Model 275 micro catheter",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "PROCEDURE"
      ],
      "sponsor": "Janssen Research & Development, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 39,
      "start_date": "2010-10-21",
      "completion_date": "2017-05-31",
      "has_results": false,
      "last_update_posted_date": "2017-08-08",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 2,
      "location_summary": "Arcadia, California • Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Arcadia",
          "state": "California"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01226628"
    },
    {
      "nct_id": "NCT04606355",
      "title": "Autostereoscopic Dynamic Near Vision Testing",
      "overall_status": "SUSPENDED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Visual Suppression",
        "Amblyopia",
        "Color Vision Defects"
      ],
      "interventions": [
        {
          "name": "Visual Acuity",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "stereopsis",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Color vision",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Alaska Blind Child Discovery",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "95 Years",
        "sex": "ALL",
        "summary": "1 Year to 95 Years"
      },
      "enrollment_count": 300,
      "start_date": "2017-11-16",
      "completion_date": "2024-12-31",
      "has_results": false,
      "last_update_posted_date": "2024-07-31",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 1,
      "location_summary": "Anchorage, Alaska",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04606355"
    },
    {
      "nct_id": "NCT05486546",
      "title": "Contoura With Phorcides Compared to Wavefront Optimized LASIK",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Myopia",
        "Astigmatism"
      ],
      "interventions": [
        {
          "name": "Contoura with Phorcides",
          "type": "PROCEDURE"
        },
        {
          "name": "WaveLight Wavefront Optimized",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DEVICE"
      ],
      "sponsor": "Daniel Terveen",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "38 Years",
        "sex": "ALL",
        "summary": "21 Years to 38 Years"
      },
      "enrollment_count": 120,
      "start_date": "2022-08-15",
      "completion_date": "2023-12-01",
      "has_results": false,
      "last_update_posted_date": "2023-04-26",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 4,
      "location_summary": "Bozeman, Montana • Omaha, Nebraska • Fargo, North Dakota + 1 more",
      "locations": [
        {
          "city": "Bozeman",
          "state": "Montana"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        },
        {
          "city": "Fargo",
          "state": "North Dakota"
        },
        {
          "city": "Sioux Falls",
          "state": "South Dakota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05486546"
    },
    {
      "nct_id": "NCT00698724",
      "title": "Comparing Optical Coherence Tomography (OCT) and Visual Acuity Outcomes in Subjects Undergoing Cataract Surgery, Who Receive Xibrom Ophthalmic Solution and Standard Presurgical Care vs. Xibrom Ophthalmic Solution Plus Prednisolone Acetate 1% and Standard Presurgical Care",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Cataracts"
      ],
      "interventions": [
        {
          "name": "Xibrom, and Optive",
          "type": "DRUG"
        },
        {
          "name": "Xibrom and Pred Forte",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bp Consulting, Inc",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2008-06",
      "completion_date": "2009-06",
      "has_results": false,
      "last_update_posted_date": "2009-06-10",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 1,
      "location_summary": "Tarpon Springs, Florida",
      "locations": [
        {
          "city": "Tarpon Springs",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00698724"
    },
    {
      "nct_id": "NCT03752840",
      "title": "Village-Integrated Eye Worker Trial II",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Age-related Macular Degeneration",
        "Diabetic Retinopathy",
        "Glaucoma"
      ],
      "interventions": [
        {
          "name": "Visual acuity (presenting and pinhole)",
          "type": "OTHER"
        },
        {
          "name": "Optical coherence tomography (OCT)",
          "type": "OTHER"
        },
        {
          "name": "Intraocular pressure",
          "type": "OTHER"
        },
        {
          "name": "Active linkage to care",
          "type": "OTHER"
        },
        {
          "name": "Fundus Photography",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "60 Years and older"
      },
      "enrollment_count": 60200,
      "start_date": "2019-04-21",
      "completion_date": "2029-08-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-09",
      "last_synced_at": "2026-10-18T05:48:40.700Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03752840"
    }
  ]
}