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Intraocular Pressure Accuracy and Variability of the Barraquer Tonometer

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified May 2008 by Barnes Retina Institute.
Recruitment status was:  Recruiting
Information provided by:
Barnes Retina Institute Identifier:
First received: December 8, 2006
Last updated: May 6, 2008
Last verified: May 2008
To determine if the Barraquer tonometer provides an accurate and reliable measurement of intraocular pressure. The Barraquer tonometer is a device used to safely and painlessly measure intraocular pressure.

Condition Intervention
Elevated Intraocular Pressure Device: Barraquer tonometer

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Study to Compare the Accuracy and Variability of the Barraquer Tonometer With Other Methods of Tonometry

Further study details as provided by Barnes Retina Institute:

Primary Outcome Measures:
  • Central corneal thickness as measured by pachymetry [ Time Frame: at time of measurement ]
  • Intraocular pressure as measured by Schiotz tonometer [ Time Frame: at time of measurement ]
  • Tonopen [ Time Frame: at time of measurement ]
  • Barraquer tonometer [ Time Frame: at time of measurement ]
  • and Perkins tonometer [ Time Frame: at time of measurement ]

Estimated Enrollment: 300
Study Start Date: November 2006
Estimated Study Completion Date: November 2008
Estimated Primary Completion Date: November 2008 (Final data collection date for primary outcome measure)
Intervention Details:
    Device: Barraquer tonometer
    barraquer tonometer
Detailed Description:
Intraocular pressure will be checked using four different methods of tonometry. These four methods will include Tonopen, Goldmann applanation tonometry, Schiotz tonometry, and Barraquer tonometer. The data will then be compared to determine the reliability and accuracy of the Barraquer tonometer.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  1. All patients of Barnes Retina Institute who are scheduled to undergo vitreoretinal surgery.
  2. All patients scheduled for routine eye examination at the Washington University Eye Clinic or Barnes Jewish Eye Clinic.
  3. All ages (patients seen at these locations are adult patients >18 years of age).

Exclusion Criteria:

  1. Any patient who is seen in the outpatient clinics for an urgent or emergency ophthalmological issue.
  2. Any patient who has a contraindication to routine, noninvasive methods of tonometry and/or pachymetry (ie corneal ulcer).
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00409669

Contact: Arghavan Almony, MD 314 367 1278 ext 2287

United States, Missouri
Washington University School of Medicine and Barnes Jewish Hospital Recruiting
St. Louis, Missouri, United States, 63110
Contact: Pam Light    314-367-1278 ext 2287      
Sub-Investigator: Arghavan Almony, MD         
Sub-Investigator: Rajiv Rathod, MD         
Sponsors and Collaborators
Barnes Retina Institute
Principal Investigator: Gilbert Grand, MD Washington University School of Medicine and Barnes Retina Institute
  More Information

Responsible Party: Arghavan Almony, M.d., Barnes Retina Institute Identifier: NCT00409669     History of Changes
Other Study ID Numbers: BRI 06-0987
Study First Received: December 8, 2006
Last Updated: May 6, 2008

Keywords provided by Barnes Retina Institute:
Barraquer tonometer
Intraocular pressure
Tonometry processed this record on August 23, 2017