GAT-DCT-Discordance Due to Corneal Properties

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: NCT01474070
Recruitment Status : Completed
First Posted : November 17, 2011
Last Update Posted : October 18, 2016
Information provided by (Responsible Party):
University of Zurich

Brief Summary:
IOP is measured with two devices (Dynamic Contour Tonometry (DCT) and Goldmann applanation tonometry (GAT)).

Condition or disease Intervention/treatment
Glaucoma Device: Intraocular Pressure Measurement

Detailed Description:

DCT reading will be compared to a corrected GAT reading by the formula of Elsheikh, Alhasso and Pye.

  • Trial with medical device

Study Type : Observational
Actual Enrollment : 112 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Influence of Discordant Intraocular Eye Pressure Readings Taken by Dynamic Contour Tonometry and Goldmann Applanation Tonometry
Study Start Date : November 2011
Actual Primary Completion Date : September 2016
Actual Study Completion Date : October 2016

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Glaucoma
U.S. FDA Resources

Intervention Details:
    Device: Intraocular Pressure Measurement
    Intraocular pressure is measured with GAT and with DCT
    Other Names:
    • Goldmann Applanation Tonometry (GAT)
    • Dynamic Contour Tonometry (DCT)

Primary Outcome Measures :
  1. Intraocular pressure (IOP) [ Time Frame: IOP is measured at the only study visit ]
    IOP is measured with goldman-applanation tonometer and dynamic-contour-tonometer at the only study visit (V0)

Secondary Outcome Measures :
  1. Demographical and clinical data [ Time Frame: study visit V0 ]
    Age, axial length of the eye, central corneal thickness

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:   No
Sampling Method:   Non-Probability Sample
Study Population
glaucoma patients

Inclusion criteria:

  • clinical diagnosis of glaucoma

Exclusion criteria:

  • other optic neuropathy other then glaucoma
  • age<18
  • corneal surgery
  • use of contact lenses

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): NCT01474070

University Hospital Zurich, Ophthalmic Clinic
Zurich, ZH, Switzerland, 8091
Sponsors and Collaborators
University of Zurich
Principal Investigator: Christoph Kniestedt, MD University Hospital Zurich, Ophthalmic Clinic

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: University of Zurich Identifier: NCT01474070     History of Changes
Other Study ID Numbers: GAT-DCT-Vergleich
First Posted: November 17, 2011    Key Record Dates
Last Update Posted: October 18, 2016
Last Verified: October 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Keywords provided by University of Zurich:
Goldmann Tonometry
Dynamic Contour Tonometry

Additional relevant MeSH terms:
Ocular Hypertension
Eye Diseases