{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Pupil+Diameter",
    "query": {
      "condition": "Pupil Diameter"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 8,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-24T01:34:07.936Z",
  "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": "NCT01579565",
      "title": "Safety, Efficacy and Pharmacokinetics of OMS302 in Subjects Undergoing Intraocular Lens Replacement With Phacoemulsification",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Intraocular Lens Replacement"
      ],
      "interventions": [
        {
          "name": "OMS302",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Omeros Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 416,
      "start_date": "2012-04",
      "completion_date": "2013-01",
      "has_results": true,
      "last_update_posted_date": "2017-06-14",
      "last_synced_at": "2026-07-24T01:34:07.936Z",
      "location_count": 13,
      "location_summary": "Chandler, Arizona • Los Angeles, California • Fort Myers, Florida + 10 more",
      "locations": [
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Fort Myers",
          "state": "Florida"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01579565"
    },
    {
      "nct_id": "NCT01454063",
      "title": "Safety and Efficacy of OMS302 in Subjects Undergoing Intraocular Lens Replacement With Phacoemulsification",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Intraocular Lens Replacement"
      ],
      "interventions": [
        {
          "name": "OMS302",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Omeros Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 405,
      "start_date": "2011-09",
      "completion_date": "2012-03",
      "has_results": true,
      "last_update_posted_date": "2014-08-21",
      "last_synced_at": "2026-07-24T01:34:07.936Z",
      "location_count": 16,
      "location_summary": "Chandler, Arizona • Glendale, Arizona • Los Angeles, California + 13 more",
      "locations": [
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Glendale",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Cape Coral",
          "state": "Florida"
        },
        {
          "city": "Fort Myers",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01454063"
    },
    {
      "nct_id": "NCT04455295",
      "title": "Testing the Noradrenergic Hypothesis of Transcutaneous Vagus Nerve Stimulation",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "no Condition",
        "Electroencephalography",
        "Pupil Diameter"
      ],
      "interventions": [
        {
          "name": "Transdermal Vagus Nerve Stimulation (tVNS)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Arkansas Tech University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 55,
      "start_date": "2020-09-01",
      "completion_date": "2025-06-01",
      "has_results": false,
      "last_update_posted_date": "2024-02-28",
      "last_synced_at": "2026-07-24T01:34:07.936Z",
      "location_count": 1,
      "location_summary": "Russellville, Arkansas",
      "locations": [
        {
          "city": "Russellville",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04455295"
    },
    {
      "nct_id": "NCT01729962",
      "title": "Comparative Study of the Optical Biometer for Measurements of the Eye",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Normal Non-fluency",
        "Cataract",
        "Aphakic Eye",
        "Eyes With Corneal Abnormality"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Nidek Co. LTD.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 125,
      "start_date": "2012-12",
      "completion_date": "2013-05",
      "has_results": false,
      "last_update_posted_date": "2013-06-28",
      "last_synced_at": "2026-07-24T01:34:07.936Z",
      "location_count": 1,
      "location_summary": "Greensboro, North Carolina",
      "locations": [
        {
          "city": "Greensboro",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01729962"
    },
    {
      "nct_id": "NCT00695890",
      "title": "Effects of Sevoflurane and Propofol on Light Flash Evoked Pupillometry",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Measurement of Pupil Diameter"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Medicine and Dentistry of New Jersey",
      "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": 30,
      "start_date": "2007-09",
      "completion_date": "2009-09",
      "has_results": false,
      "last_update_posted_date": "2014-12-19",
      "last_synced_at": "2026-07-24T01:34:07.936Z",
      "location_count": 1,
      "location_summary": "Newark, New Jersey",
      "locations": [
        {
          "city": "Newark",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00695890"
    },
    {
      "nct_id": "NCT00413751",
      "title": "Effect of Brimonidine Tartrate Ophthalmic Solution 0.15% on Pupil Diameter in Normal Eyes",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Brimonidine tartrate ophthalmic solution 0.15% (Alphagan P)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Walter Reed Army Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 20,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2006-12-20",
      "last_synced_at": "2026-07-24T01:34:07.936Z",
      "location_count": 1,
      "location_summary": "Washington D.C., District of Columbia",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00413751"
    },
    {
      "nct_id": "NCT04105998",
      "title": "Effects of Intramuscular (IM) Oxytocin on Pupil Diameter and Heart Rate Variability (HRV)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Chronic Pain Due to Injury"
      ],
      "interventions": [
        {
          "name": "Oxytocin",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "66 Years",
        "sex": "ALL",
        "summary": "18 Years to 66 Years"
      },
      "enrollment_count": 22,
      "start_date": "2019-10-24",
      "completion_date": "2021-11-01",
      "has_results": true,
      "last_update_posted_date": "2022-11-10",
      "last_synced_at": "2026-07-24T01:34:07.936Z",
      "location_count": 1,
      "location_summary": "Winston-Salem, North Carolina",
      "locations": [
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04105998"
    },
    {
      "nct_id": "NCT02132312",
      "title": "A Randomized Study in Children Ages Birth Through Three Years Undergoing Unilateral Cataract Extraction With or Without Lens Replacement",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Unilateral Cataract Extraction",
        "Congenital Cataract"
      ],
      "interventions": [
        {
          "name": "OMS302",
          "type": "DRUG"
        },
        {
          "name": "Phenylephrine HCl",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Omeros Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Day",
        "maximum_age": "47 Months",
        "sex": "ALL",
        "summary": "1 Day to 47 Months"
      },
      "enrollment_count": 78,
      "start_date": "2014-07",
      "completion_date": "2016-09-12",
      "has_results": true,
      "last_update_posted_date": "2021-07-22",
      "last_synced_at": "2026-07-24T01:34:07.936Z",
      "location_count": 11,
      "location_summary": "Los Angeles, California • Atlanta, Georgia • Chicago, Illinois + 8 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Kansas City",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02132312"
    }
  ]
}