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Intra-observer and Inter-observer Variability With Dynamic Contour Tonometry.

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ClinicalTrials.gov Identifier: NCT00818233
Recruitment Status : Withdrawn (Difficulty recruiting patients. PI left research facility.)
First Posted : January 7, 2009
Last Update Posted : May 13, 2016
Sponsor:
Information provided by:
Yale University

Study Description
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Brief Summary:
The aim of the protocol is to document intra-observer and inter-observer variability with dynamic contour tonometry, and will also test the theory that pulse amplitude, as measured by dynamic contour tonometry, is correlated with the difference in systolic and diastolic blood pressures.

Condition or disease Intervention/treatment
Intraocular Pressure Device: Dynamic contour tonometry

Study Design
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Study Type : Observational
Actual Enrollment : 0 participants
Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Intra-observer and Inter-observer Variability With Dynamic Contour Tonometry.
Study Start Date : January 2009
Groups and Cohorts
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Group/Cohort Intervention/treatment
Observation
Variability will be assessed between each examiner.
 Device: Dynamic contour tonometry
Observe variability of measurements by dynamic contour tonometry
Other Names:
  • PASCAL tonometry
  • DCT


Outcome Measures
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Primary Outcome Measures :
  1. The variability of intraocular pressure measurements using dynamic contour tonometry [ Time Frame: Same day ]

Secondary Outcome Measures :
  1. Observe how pulse amplitude, as measured by dynamic contour tonometry, correlates with the difference in systolic and diastolic blood pressures [ Time Frame: Same day ]

Eligibility Criteria
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Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Healthy, competent adults with normal, healthy eyes.
Criteria

Inclusion Criteria:

  • Normal, healthy eyes
  • Minimal to moderate refractive error
  • Willingness to participate in the study

Exclusion Criteria:

  • Diagnosis of any type of glaucoma
  • Any prior ocular surgery
  • Any prior ocular trauma
  • Any known anterior segment pathology
Contacts and Locations
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Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00818233


Locations
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United States, Connecticut
Yale Eye Center
New Haven, Connecticut, United States, 06510
Sponsors and Collaborators
Yale University
Investigators
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Principal Investigator: Hylton R Mayer, MD Yale University
More Information
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Responsible Party: Hylton R. Mayer, Yale University
ClinicalTrials.gov Identifier: NCT00818233    
Other Study ID Numbers: 0601001047
First Posted: January 7, 2009    Key Record Dates
Last Update Posted: May 13, 2016
Last Verified: May 2016
Keywords provided by Yale University:
dynamic contour tonometry
variability
pulse amplitude
Ocular pulse amplitude