{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Visual+Performance+tests",
    "query": {
      "intervention": "Visual Performance tests"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 60,
    "total_pages": 6,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Visual+Performance+tests&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-06T02:50:31.870Z",
  "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": "NCT01234207",
      "title": "Clinical Assessment of a Customized Free-form Progressive Addition Lens Spectacle",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Presbyopia"
      ],
      "interventions": [
        {
          "name": "Standard, non-free-form, non-customized PAL spectacles",
          "type": "DEVICE"
        },
        {
          "name": "Individually customized free-form surfaced PAL spectacles",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of California, Berkeley",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "39 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "39 Years to 80 Years"
      },
      "enrollment_count": 95,
      "start_date": "2009-02",
      "completion_date": "2009-10",
      "has_results": true,
      "last_update_posted_date": "2017-04-18",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "Berkeley, California",
      "locations": [
        {
          "city": "Berkeley",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01234207"
    },
    {
      "nct_id": "NCT04786886",
      "title": "Patient Performance and Acceptance of Virtual Reality Visual Field Devices",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Visual Field Defect, Peripheral",
        "Visual Field Defect, Nasal Step",
        "Visual Field Defect, Paracentral Scotoma of Both Eyes"
      ],
      "interventions": [
        {
          "name": "VIrtual Reality Visual Field Exam",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Miami",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "13 Years and older"
      },
      "enrollment_count": 58,
      "start_date": "2019-11-04",
      "completion_date": "2021-02-02",
      "has_results": false,
      "last_update_posted_date": "2021-03-08",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04786886"
    },
    {
      "nct_id": "NCT04105530",
      "title": "Transcranial Direct Current Stimulation of the Temporal Cortex in Survivors of Childhood Acute Lymphoblastic Leukemia (ALL)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Acute Lymphoblastic Leukemia",
        "Transcranial Direct Current Stimulation",
        "Executive Dysfunction"
      ],
      "interventions": [
        {
          "name": "Anodal tDCS treatment",
          "type": "DEVICE"
        },
        {
          "name": "Cathodal tDCS treatment",
          "type": "DEVICE"
        },
        {
          "name": "Sham treatment",
          "type": "DEVICE"
        },
        {
          "name": "NIH Toolbox List Sorting Working Memory Test",
          "type": "OTHER"
        },
        {
          "name": "NIH Toolbox Flanker Inhibitory Control and Attention Test",
          "type": "OTHER"
        },
        {
          "name": "Grooved Peg Board Test",
          "type": "OTHER"
        },
        {
          "name": "Buschke Selective Reminding Test",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "OTHER"
      ],
      "sponsor": "St. Jude Children's Research Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "215 Months",
        "sex": "ALL",
        "summary": "8 Years to 215 Months"
      },
      "enrollment_count": 36,
      "start_date": "2019-11-18",
      "completion_date": "2024-09",
      "has_results": false,
      "last_update_posted_date": "2024-01-12",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "Memphis, Tennessee",
      "locations": [
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04105530"
    },
    {
      "nct_id": "NCT01476644",
      "title": "How Has Glaucoma Affected Your Quality of Life?",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Glaucoma",
        "Quality of Life"
      ],
      "interventions": [
        {
          "name": "Clinical evaluation",
          "type": "OTHER"
        },
        {
          "name": "Performance based measures",
          "type": "OTHER"
        },
        {
          "name": "Subjective measures of vision-related quality of life",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Wills Eye",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 161,
      "start_date": "2011-10",
      "completion_date": "2017-06",
      "has_results": true,
      "last_update_posted_date": "2019-11-15",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01476644"
    },
    {
      "nct_id": "NCT05141448",
      "title": "Visual Performance of Soft Contact Lenses With Myopia Control Optics",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [],
      "conditions": [
        "Visual Acuity"
      ],
      "interventions": [
        {
          "name": "1-Day Acuvue Moist",
          "type": "DEVICE"
        },
        {
          "name": "EMO-118",
          "type": "DEVICE"
        },
        {
          "name": "EMO-114",
          "type": "DEVICE"
        },
        {
          "name": "MiSight® 1 day",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Johnson & Johnson Vision Care, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "7 Years to 17 Years"
      },
      "enrollment_count": 79,
      "start_date": "2021-11-22",
      "completion_date": "2022-04-01",
      "has_results": true,
      "last_update_posted_date": "2025-04-27",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05141448"
    },
    {
      "nct_id": "NCT02187796",
      "title": "Prevalence of HIV-associated Neurocognitive Disorders (HAND) in a School of Medicine HIV/AIDS Outpatient Clinic",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "HIV-ASSOCIATED NEUROCOGNITIVE DISORDER (HAND)"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "East Tennessee State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "25 Years to 75 Years"
      },
      "enrollment_count": 50,
      "start_date": "2014-05",
      "completion_date": "2015-06",
      "has_results": false,
      "last_update_posted_date": "2015-08-04",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "Johnson City, Tennessee",
      "locations": [
        {
          "city": "Johnson City",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02187796"
    },
    {
      "nct_id": "NCT03182868",
      "title": "Vestibular Testing: Consistency and Effects Over Time",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Dizziness"
      ],
      "interventions": [
        {
          "name": "PAS Goggle",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Miami",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 78,
      "start_date": "2015-10-29",
      "completion_date": "2016-11-28",
      "has_results": true,
      "last_update_posted_date": "2022-05-17",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03182868"
    },
    {
      "nct_id": "NCT05004649",
      "title": "Studying the Effects of Natural Visual Scene Changes on Typical Adult Visual Perception",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Visual Perception"
      ],
      "interventions": [
        {
          "name": "Psychophysical task",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 19,
      "start_date": "2021-08-09",
      "completion_date": "2022-03-23",
      "has_results": true,
      "last_update_posted_date": "2023-05-10",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05004649"
    },
    {
      "nct_id": "NCT04923633",
      "title": "The Reproducibility and Consistency of Instrument-assisted Soft Tissue Manipulation",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Massage"
      ],
      "interventions": [
        {
          "name": "Quantifiable Soft Tissue Manipulation (QSTM)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 106,
      "start_date": "2021-05-11",
      "completion_date": "2022-10-19",
      "has_results": false,
      "last_update_posted_date": "2023-11-14",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "Indianapolis, Indiana",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04923633"
    },
    {
      "nct_id": "NCT06606925",
      "title": "Determining Which Regions of the Brain Are Active During Flight Simulation at Separate Timepoints During Training",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cognitive Performance"
      ],
      "interventions": [
        {
          "name": "fMRI with virtual reality flight simulator",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "The Geneva Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "54 Years",
        "sex": "ALL",
        "summary": "18 Years to 54 Years"
      },
      "enrollment_count": 35,
      "start_date": "2023-09-19",
      "completion_date": "2026-07-10",
      "has_results": false,
      "last_update_posted_date": "2026-07-15",
      "last_synced_at": "2026-09-06T02:50:31.870Z",
      "location_count": 1,
      "location_summary": "San Antonio, Texas",
      "locations": [
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06606925"
    }
  ]
}