{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Measurement+of+Refractive+Error",
    "query": {
      "condition": "Measurement of Refractive Error"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 9,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-04T06:19:10.382Z",
  "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": "NCT07679048",
      "title": "Measuring How Quickly the Eye Focuses After Sustained Viewing of Close-up Images and Videos",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Distance Viewing",
        "Prolonged Near Viewing"
      ],
      "interventions": [
        {
          "name": "Near viewing first",
          "type": "OTHER"
        },
        {
          "name": "Distant viewing first",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Rochester Institute of Technology",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 20,
      "start_date": "2026-06-25",
      "completion_date": "2026-12-15",
      "has_results": false,
      "last_update_posted_date": "2026-07-08",
      "last_synced_at": "2026-09-04T06:19:10.382Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07679048"
    },
    {
      "nct_id": "NCT01893671",
      "title": "Corneal Power, Astigmatism, and Aberration Changes After LASIK",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Measurements of Patients Using OCT Before and After LASIK"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Oregon Health and Science University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 22,
      "start_date": "2011-01",
      "completion_date": "2017-08-31",
      "has_results": false,
      "last_update_posted_date": "2018-04-05",
      "last_synced_at": "2026-09-04T06:19:10.382Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01893671"
    },
    {
      "nct_id": "NCT01775007",
      "title": "A Pilot Study to Test the Safety and Feasibility of a Brillouin Ocular Analyzer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Measurement of the Elasticity of the Anterior Eye Segment"
      ],
      "interventions": [
        {
          "name": "Brillouin Ocular Analyser",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "20 Years to 60 Years"
      },
      "enrollment_count": 31,
      "start_date": "2011-03",
      "completion_date": "2017-09",
      "has_results": false,
      "last_update_posted_date": "2022-08-02",
      "last_synced_at": "2026-09-04T06:19:10.382Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01775007"
    },
    {
      "nct_id": "NCT07642999",
      "title": "Longitudinal Measurements of Visual Diet in Children",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Myopia",
        "Visual Diet",
        "Pupil",
        "Viewing Distance",
        "Illuminance",
        "Wavelength",
        "Vergence",
        "Accommodative Facility"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "State University of New York College of Optometry",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": "12 Years",
        "sex": "ALL",
        "summary": "7 Years to 12 Years"
      },
      "enrollment_count": 60,
      "start_date": "2026-06-08",
      "completion_date": "2031-06",
      "has_results": false,
      "last_update_posted_date": "2026-06-11",
      "last_synced_at": "2026-09-04T06:19:10.382Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07642999"
    },
    {
      "nct_id": "NCT06209476",
      "title": "Clinical Investigation on Assessing the Repeatability and Reproducibility of Central and Peripheral Refractive Error",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Refractive Error"
      ],
      "interventions": [
        {
          "name": "Experimental",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Johnson & Johnson Vision Care, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 30,
      "start_date": "2024-01-16",
      "completion_date": "2024-02-05",
      "has_results": false,
      "last_update_posted_date": "2025-04-25",
      "last_synced_at": "2026-09-04T06:19:10.382Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06209476"
    },
    {
      "nct_id": "NCT07570602",
      "title": "VisionApp - Refraction and Presbyopia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Presbyopia",
        "Refractive Errors"
      ],
      "interventions": [
        {
          "name": "VisionApp",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 16,
      "start_date": "2023-07-05",
      "completion_date": "2023-07-24",
      "has_results": true,
      "last_update_posted_date": "2026-06-11",
      "last_synced_at": "2026-09-04T06:19:10.382Z",
      "location_count": 1,
      "location_summary": "Bloomington, Indiana",
      "locations": [
        {
          "city": "Bloomington",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07570602"
    },
    {
      "nct_id": "NCT06797856",
      "title": "Measurement of Refractive Error in Pseudophakic Eyes Using an Autorefractor and a Wavefront Aberrometer",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Measurement of Refractive Error"
      ],
      "interventions": [
        {
          "name": "Refractive Error",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Johnson & Johnson Surgical Vision, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 46,
      "start_date": "2025-02-17",
      "completion_date": "2025-07-09",
      "has_results": false,
      "last_update_posted_date": "2025-07-23",
      "last_synced_at": "2026-09-04T06:19:10.382Z",
      "location_count": 1,
      "location_summary": "Long Beach, California",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06797856"
    },
    {
      "nct_id": "NCT05856786",
      "title": "To Study the Effects of Refractive Surgery on OCT Measurements in the Eye",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Optical Coherence Tomography",
        "Refractive Errors",
        "Myopia"
      ],
      "interventions": [
        {
          "name": "Optical coherence tomography",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "University of Nebraska",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "19 Years and older"
      },
      "enrollment_count": 33,
      "start_date": "2024-06-01",
      "completion_date": "2027-12",
      "has_results": false,
      "last_update_posted_date": "2026-08-26",
      "last_synced_at": "2026-09-04T06:19:10.382Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05856786"
    },
    {
      "nct_id": "NCT06045325",
      "title": "Assessment of Measurement Variability Across Automated Biometry Devices",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Myopia"
      ],
      "interventions": [
        {
          "name": "Orbscan II",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "IOL Master 700",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "IOL Master 500",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Atlas 9000",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Lenstar 900",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Pentacam",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "iTrace",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Argos",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Manual caliper measurement",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Berkeley Eye Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 204,
      "start_date": "2023-07-25",
      "completion_date": "2024-02-16",
      "has_results": true,
      "last_update_posted_date": "2025-05-13",
      "last_synced_at": "2026-09-04T06:19:10.382Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06045325"
    }
  ]
}