{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Visual+estimation&page=2",
    "query": {
      "intervention": "Visual estimation",
      "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=Visual+estimation&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-07T04:42:23.955Z",
  "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": "NCT05309993",
      "title": "INvestigation of TENS Efficacy Versus Posterior Tibial Nerve Stimulation for Overactive Bladder",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Overactive Bladder",
        "Overactive Bladder Syndrome",
        "Urinary Urge Incontinence",
        "Urinary Bladder, Overactive",
        "Urinary Incontinence, Urge"
      ],
      "interventions": [
        {
          "name": "PTNS",
          "type": "DEVICE"
        },
        {
          "name": "TENS",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of New Mexico",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 27,
      "start_date": "2022-06-30",
      "completion_date": "2025-08-01",
      "has_results": false,
      "last_update_posted_date": "2025-10-31",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 1,
      "location_summary": "Albuquerque, New Mexico",
      "locations": [
        {
          "city": "Albuquerque",
          "state": "New Mexico"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05309993"
    },
    {
      "nct_id": "NCT05258357",
      "title": "Landmark vs. Ultrasound-Assisted Bone Marrow Biopsy Procedure Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Bone Marrow Biopsy Procedure"
      ],
      "interventions": [
        {
          "name": "Ultrasound-assisted bone marrow biopsy",
          "type": "DEVICE"
        },
        {
          "name": "Landmark palpation bone marrow biopsy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE"
      ],
      "sponsor": "Medical College of Wisconsin",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2022-05-18",
      "completion_date": "2026-05-12",
      "has_results": false,
      "last_update_posted_date": "2026-08-04",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 1,
      "location_summary": "Milwaukee, Wisconsin",
      "locations": [
        {
          "city": "Milwaukee",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05258357"
    },
    {
      "nct_id": "NCT04155983",
      "title": "High Versus Low Adductor Canal Block",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Osteo Arthritis Knee"
      ],
      "interventions": [
        {
          "name": "Ropivacaine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Carilion Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 140,
      "start_date": "2020-03-11",
      "completion_date": "2021-12-31",
      "has_results": false,
      "last_update_posted_date": "2020-10-30",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 1,
      "location_summary": "Roanoke, Virginia",
      "locations": [
        {
          "city": "Roanoke",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04155983"
    },
    {
      "nct_id": "NCT06155695",
      "title": "Auditory Control Enhancement (ACE) in Schizophrenia",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Auditory Hallucinations"
      ],
      "interventions": [
        {
          "name": "Transcranial Direct Current Stimulation (tDCS)",
          "type": "DEVICE"
        },
        {
          "name": "Auditory Cognitive Control Training (ACCT)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "BEHAVIORAL"
      ],
      "sponsor": "Brian A Coffman, PhD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 12,
      "start_date": "2023-09-05",
      "completion_date": "2024-12-18",
      "has_results": true,
      "last_update_posted_date": "2026-04-07",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06155695"
    },
    {
      "nct_id": "NCT04989309",
      "title": "Left and Right Hemisphere Contributions to Speech Perception",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Neural Bases of Speech Perception"
      ],
      "interventions": [
        {
          "name": "Transcranial Magnetic Stimulation",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Connecticut",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 26,
      "start_date": "2024-12-19",
      "completion_date": "2026-06-30",
      "has_results": false,
      "last_update_posted_date": "2025-06-15",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 1,
      "location_summary": "Storrs, Connecticut",
      "locations": [
        {
          "city": "Storrs",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04989309"
    },
    {
      "nct_id": "NCT07270133",
      "title": "Longitudinal Natural History Study of Retinal Function in Eyes of Patients With Diabetes",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Diabetic Retinal Disease"
      ],
      "interventions": [
        {
          "name": "Visual Acuity",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Reading Speed",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Visual Field testing",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Contrast sensitivity",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Electroretinography (ERG) and pupillography in light- and dark-adapted states",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Ultrawide field-color photograph",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Ultrawide field-Fluorescein angiogram",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Optical coherence tomography",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Optical coherence tomography- Angiography",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST",
        "OTHER"
      ],
      "sponsor": "Jaeb Center for Health Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 450,
      "start_date": "2026-06-01",
      "completion_date": "2032-12",
      "has_results": false,
      "last_update_posted_date": "2026-08-20",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 4,
      "location_summary": "Augusta, Georgia • Boston, Massachusetts • Detroit, Michigan + 1 more",
      "locations": [
        {
          "city": "Augusta",
          "state": "Georgia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "Monroeville",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07270133"
    },
    {
      "nct_id": "NCT03204604",
      "title": "The Brain Ketone Body Challenge Imaging Study",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Alzheimer Disease"
      ],
      "interventions": [
        {
          "name": "Challenge A - low calorie Ensure®",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Challenge B - Ensure® plus ketone esters (KE)",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "PET Scan",
          "type": "PROCEDURE"
        },
        {
          "name": "Cognitive Testing - FCSRT",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Story Recall",
          "type": "BEHAVIORAL"
        },
        {
          "name": "BVRT",
          "type": "BEHAVIORAL"
        },
        {
          "name": "CogState One Card Learning",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "PROCEDURE",
        "BEHAVIORAL"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "50 Years to 85 Years"
      },
      "enrollment_count": 0,
      "start_date": "2016-08-08",
      "completion_date": "2019-03",
      "has_results": false,
      "last_update_posted_date": "2019-03-19",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 1,
      "location_summary": "Winston-Salem, North Carolina",
      "locations": [
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03204604"
    },
    {
      "nct_id": "NCT07623993",
      "title": "Prospective Observational Study of Smartphone-Based AI Self-Monitoring During Non-Surgical Treatment for Thyroid Eye Disease (THYROSCOPE)",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Thyroid Eye Disease (TED)",
        "Graves Ophthalmopathy",
        "Thyroid Associated Ophthalmopathies"
      ],
      "interventions": [
        {
          "name": "Smartphone-based AI self-monitoring application (Glandy CAS/EXO/LID)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "THYROSCOPE INC.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "22 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "22 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2026-07-01",
      "completion_date": "2027-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-03",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 1,
      "location_summary": "San Jose, California",
      "locations": [
        {
          "city": "San Jose",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07623993"
    },
    {
      "nct_id": "NCT04038450",
      "title": "Accuracy of Visual Range of Motion Estimates",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Accuracy of Estimation of Joint Range of Motion"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Methodist University, North Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 522,
      "start_date": "2019-02-15",
      "completion_date": "2019-03-15",
      "has_results": false,
      "last_update_posted_date": "2019-07-30",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 1,
      "location_summary": "Fayetteville, North Carolina",
      "locations": [
        {
          "city": "Fayetteville",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04038450"
    },
    {
      "nct_id": "NCT03951064",
      "title": "Providing Optimal PEEP During Mechanical Ventilation for Obese Patients Using Esophageal Balloon",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity, Morbid",
        "Ventilator-Induced Lung Injury",
        "Respiratory Failure"
      ],
      "interventions": [
        {
          "name": "Esophageal balloon",
          "type": "DEVICE"
        },
        {
          "name": "Intervention Spontaneous Breathing Trial (SBT) and Extubation",
          "type": "PROCEDURE"
        },
        {
          "name": "Control Spontaneous Breathing Trial and Extubation",
          "type": "PROCEDURE"
        },
        {
          "name": "Intervention Weaning after Tracheostomy",
          "type": "PROCEDURE"
        },
        {
          "name": "Control Weaning after Tracheostomy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE"
      ],
      "sponsor": "University of North Carolina, Chapel Hill",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 6,
      "start_date": "2021-03-31",
      "completion_date": "2022-12-06",
      "has_results": true,
      "last_update_posted_date": "2024-06-05",
      "last_synced_at": "2026-09-07T04:42:23.955Z",
      "location_count": 2,
      "location_summary": "Chapel Hill, North Carolina • Greenville, North Carolina",
      "locations": [
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        },
        {
          "city": "Greenville",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03951064"
    }
  ]
}