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

This study has been withdrawn prior to enrollment.
(Difficulty recruiting patients. PI left research facility.)
Information provided by:
Yale University Identifier:
First received: November 18, 2008
Last updated: May 11, 2016
Last verified: May 2016
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 Intervention
Intraocular Pressure
Device: Dynamic contour tonometry

Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Intra-observer and Inter-observer Variability With Dynamic Contour Tonometry.

Further study details as provided by Yale University:

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

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

Enrollment: 0
Study Start Date: January 2009
Groups/Cohorts Assigned Interventions
Variability will be assessed between each examiner.
Device: Dynamic contour tonometry
Observe variability of measurements by dynamic contour tonometry
Other Names:
  • PASCAL tonometry
  • DCT


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

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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Please refer to this study by its identifier: NCT00818233

United States, Connecticut
Yale Eye Center
New Haven, Connecticut, United States, 06510
Sponsors and Collaborators
Yale University
Principal Investigator: Hylton R Mayer, MD Yale University
  More Information

Responsible Party: Hylton R. Mayer, Yale University Identifier: NCT00818233     History of Changes
Other Study ID Numbers: 0601001047
Study First Received: November 18, 2008
Last Updated: May 11, 2016

Keywords provided by Yale University:
dynamic contour tonometry
pulse amplitude
Ocular pulse amplitude processed this record on May 25, 2017