Intraocular Pressure Accuracy and Variability of the Barraquer Tonometer

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00409669
Recruitment Status : Unknown
Verified May 2008 by Barnes Retina Institute.
Recruitment status was:  Recruiting
First Posted : December 11, 2006
Last Update Posted : May 9, 2008
Information provided by:
Barnes Retina Institute

Brief Summary:
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 or disease Intervention/treatment Phase
Elevated Intraocular Pressure Device: Barraquer tonometer Not Applicable

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.

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 300 participants
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
Study Start Date : November 2006
Estimated Primary Completion Date : November 2008
Estimated Study Completion Date : November 2008

Intervention Details:
    Device: Barraquer tonometer
    barraquer tonometer

Primary Outcome Measures :
  1. Central corneal thickness as measured by pachymetry [ Time Frame: at time of measurement ]
  2. Intraocular pressure as measured by Schiotz tonometer [ Time Frame: at time of measurement ]
  3. Tonopen [ Time Frame: at time of measurement ]
  4. Barraquer tonometer [ Time Frame: at time of measurement ]
  5. and Perkins tonometer [ Time Frame: at time of measurement ]

Information from the National Library of Medicine

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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).

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 identifier (NCT number): 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

Responsible Party: Arghavan Almony, M.d., Barnes Retina Institute Identifier: NCT00409669     History of Changes
Other Study ID Numbers: BRI 06-0987
First Posted: December 11, 2006    Key Record Dates
Last Update Posted: May 9, 2008
Last Verified: May 2008

Keywords provided by Barnes Retina Institute:
Barraquer tonometer
Intraocular pressure