{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Prism+Glasses",
    "query": {
      "intervention": "Prism Glasses"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 12,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Prism+Glasses&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-13T18:17:49.099Z",
  "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": "NCT00785135",
      "title": "Effects of Prismatic Spectacle Lenses on Symptoms of Dizziness, Headache and Anxiety as Caused by Vertical Heterophoria",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Binocular Dysfunction",
        "Vertical Heterophoria",
        "Vision, Binocular",
        "Vision Disparity"
      ],
      "interventions": [
        {
          "name": "Lenses containing prismatic correction",
          "type": "DEVICE"
        },
        {
          "name": "Lenses not containing prismatic correction",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Vision Specialists of Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "14 Years and older"
      },
      "enrollment_count": 13,
      "start_date": "2008-11",
      "completion_date": "2015-11",
      "has_results": false,
      "last_update_posted_date": "2020-10-12",
      "last_synced_at": "2026-09-13T18:17:49.099Z",
      "location_count": 1,
      "location_summary": "Birmingham, Michigan",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00785135"
    },
    {
      "nct_id": "NCT03998670",
      "title": "Base-in Prism Spectacles for Intermittent Exotropia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Exotropia Intermittent"
      ],
      "interventions": [
        {
          "name": "Prism Glasses",
          "type": "DEVICE"
        },
        {
          "name": "Non-Prism Glasses",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Jaeb Center for Health Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "13 Years",
        "sex": "ALL",
        "summary": "3 Years to 13 Years"
      },
      "enrollment_count": 61,
      "start_date": "2019-09-01",
      "completion_date": "2020-07-30",
      "has_results": true,
      "last_update_posted_date": "2023-10-04",
      "last_synced_at": "2026-09-13T18:17:49.099Z",
      "location_count": 28,
      "location_summary": "Birmingham, Alabama • Glendale, Arizona • Little Rock, Arkansas + 23 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Glendale",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Fullerton",
          "state": "California"
        },
        {
          "city": "Pomona",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03998670"
    },
    {
      "nct_id": "NCT00494676",
      "title": "Clinical Trial of Peripheral Prism Glasses for Hemianopia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Homonymous Hemianopia"
      ],
      "interventions": [
        {
          "name": "High power (57 prism diopter) peripheral prism glasses",
          "type": "DEVICE"
        },
        {
          "name": "Low power sham peripheral prism glasses",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Alexandra Bowers",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 73,
      "start_date": "2007-09",
      "completion_date": "2010-04",
      "has_results": true,
      "last_update_posted_date": "2017-04-04",
      "last_synced_at": "2026-09-13T18:17:49.099Z",
      "location_count": 12,
      "location_summary": "Birmingham, Alabama • Palo Alto, California • Jupiter, Florida + 9 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Jupiter",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00494676"
    },
    {
      "nct_id": "NCT04827147",
      "title": "Clinical Trial of Multi-Periscopic Prism Glasses for Hemianopia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Homonymous Hemianopia"
      ],
      "interventions": [
        {
          "name": "Multi-Periscopic Prism (MPP) glasses",
          "type": "DEVICE"
        },
        {
          "name": "Fresnel Peripheral Prism (FPP) glasses",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Massachusetts Eye and Ear Infirmary",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "7 Years and older"
      },
      "enrollment_count": 64,
      "start_date": "2023-04-03",
      "completion_date": "2026-04-30",
      "has_results": true,
      "last_update_posted_date": "2026-08-19",
      "last_synced_at": "2026-09-13T18:17:49.099Z",
      "location_count": 8,
      "location_summary": "Birmingham, Alabama • Denver, Colorado • Palm Springs, Florida + 3 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Palm Springs",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04827147"
    },
    {
      "nct_id": "NCT05070767",
      "title": "Neurolens Headache Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Binocular Vision Disorder",
        "Convergence Insufficiency",
        "Headache",
        "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": 300,
      "start_date": "2021-10-18",
      "completion_date": "2022-05-30",
      "has_results": false,
      "last_update_posted_date": "2023-10-12",
      "last_synced_at": "2026-09-13T18:17:49.099Z",
      "location_count": 10,
      "location_summary": "Phoenix, Arizona • Conyers, Georgia • Perry, Georgia + 7 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Conyers",
          "state": "Georgia"
        },
        {
          "city": "Perry",
          "state": "Georgia"
        },
        {
          "city": "Rigby",
          "state": "Idaho"
        },
        {
          "city": "Lincoln",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05070767"
    },
    {
      "nct_id": "NCT04424979",
      "title": "Feasibility Tests for Various Prism Configurations for Visual Field Loss",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hemianopia, Homonymous",
        "Tunnel Vision",
        "Visual Field Defect, Peripheral",
        "Visual Field Constriction Bilateral",
        "Visual Field Defect Homonymous Bilateral"
      ],
      "interventions": [
        {
          "name": "High power prisms",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Massachusetts Eye and Ear Infirmary",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "7 Years to 80 Years"
      },
      "enrollment_count": 20,
      "start_date": "2020-11-06",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2025-09-23",
      "last_synced_at": "2026-09-13T18:17:49.099Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04424979"
    },
    {
      "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": "2026-09-13T18:17:49.099Z",
      "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": "NCT05801991",
      "title": "Neurolens and Contact Lens Discomfort",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Contact Lens Discomfort"
      ],
      "interventions": [
        {
          "name": "Neurolens",
          "type": "DEVICE"
        },
        {
          "name": "Placebo spectacle lens",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Southern California College of Optometry at Marshall B. Ketchum University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 30,
      "start_date": "2023-05-01",
      "completion_date": "2024-03-05",
      "has_results": true,
      "last_update_posted_date": "2025-04-22",
      "last_synced_at": "2026-09-13T18:17:49.099Z",
      "location_count": 1,
      "location_summary": "Fullerton, California",
      "locations": [
        {
          "city": "Fullerton",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05801991"
    },
    {
      "nct_id": "NCT05242510",
      "title": "Evaluation of Exotropia After Patching the Eye or After Prism Adaptation",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Exotropia"
      ],
      "interventions": [
        {
          "name": "Patching",
          "type": "PROCEDURE"
        },
        {
          "name": "Prism Adaptation",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of Rochester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "Up to 17 Years"
      },
      "enrollment_count": 1,
      "start_date": "2024-08-27",
      "completion_date": "2024-09-18",
      "has_results": false,
      "last_update_posted_date": "2025-04-04",
      "last_synced_at": "2026-09-13T18:17:49.099Z",
      "location_count": 5,
      "location_summary": "Los Angeles, California • Boston, Massachusetts • Buffalo, New York + 2 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Buffalo",
          "state": "New York"
        },
        {
          "city": "Rochester",
          "state": "New York"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05242510"
    },
    {
      "nct_id": "NCT00347581",
      "title": "A Randomized Trial of Base-in Prism Reading Glasses Convergence Insufficiency in Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Convergence Insufficiency"
      ],
      "interventions": [
        {
          "name": "Base-in prism glasses for reading",
          "type": "PROCEDURE"
        },
        {
          "name": "Placebo reading glasses",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Pennsylvania College of Optometry",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "9 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "9 Years to 18 Years"
      },
      "enrollment_count": 72,
      "start_date": "2003-05",
      "completion_date": "2004-08",
      "has_results": false,
      "last_update_posted_date": "2006-07-04",
      "last_synced_at": "2026-09-13T18:17:49.099Z",
      "location_count": 10,
      "location_summary": "Birmingham, Alabama • Fullerton, California • Fort Lauderdale, Florida + 6 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Fullerton",
          "state": "California"
        },
        {
          "city": "Fort Lauderdale",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Bloomington",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00347581"
    }
  ]
}