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Changes of the Peripapillary Retinal Nerve Fiber Layer After Filtration Surgery in Glaucoma Patients

The recruitment status of this study is unknown because the information has not been verified recently.
Verified November 2011 by University Eye Hospital, Würzburg.
Recruitment status was  Recruiting
Information provided by (Responsible Party):
Juliane Matlach, MD, University Eye Hospital, Würzburg Identifier:
First received: August 21, 2011
Last updated: November 13, 2011
Last verified: November 2011

At present, trabeculectomy is the most common performed and effective surgical method of filtration surgery for patients with medically uncontrolled glaucoma.

The aim of this prospective observational case study is to determine changes of the peripapillary retinal nerve fiber layer thickness using spectral domain optical coherence tomography in patients with glaucoma after surgical reduction of intraocular pressure.

Condition Intervention
Nerve Fiber Bundle Defect
Optic Nerve Diseases
Procedure: spectral domain optical coherence tomography

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Effect of Trabeculectomy on Peripapillary Retinal Nerve Fiber Layer Thickness Using Spectral Domain Optical Coherence Tomography

Resource links provided by NLM:

Further study details as provided by University Eye Hospital, Würzburg:

Estimated Enrollment: 50
Study Start Date: November 2011
Estimated Study Completion Date: January 2013
Estimated Primary Completion Date: November 2012 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Trabeculectomy RNFL thickness OCT Procedure: spectral domain optical coherence tomography
RNFL thickness measurement using spectral domain optical coherence tomography at baseline, 1, 3 and 6 months postoperatively.

Detailed Description:

Baseline and postoperative measurement of the peripapillary retinal nerve fiber layer (RNFL) thickness will be performed using the following spectral domain optical coherence tomography (OCT): Cirrus™ HD-OCT (Carl Zeiss Meditec) and Spectralis® Heidelberg-Engineering.

The main outcome measures will be changes in overall and quadrant RNFL thickness with respect to reduction in intraocular pressure (IOP), correlation between RNFL thickness and alteration in visual field and predictive factors of postoperative IOP-reduction and changes of RNFL thickness.


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population

glaucoma patients


Inclusion Criteria:

  • primary or secondary open angle glaucoma
  • target intraocular pressure under medical treatment was not reached
  • progression of visual loss
  • best corrected visual acuity of 20/100 or more
  • spherical equivalent refraction of -8.0 to +4.0 D
  • perimetry: less than 20% false positive answers

Exclusion Criteria:

  • primary or secondary angle closure glaucoma
  • congenital glaucoma
  • normal tension glaucoma
  • neovascular glaucoma
  Contacts and Locations
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Please refer to this study by its identifier: NCT01422525

University Eye Hospital Wuerzburg Recruiting
Wuerzburg, Bavaria, Germany, 97080
Contact: Juliane Matlach, Dr.    + 49 931 201 0   
Principal Investigator: Thomas Klink, PD Dr.         
Principal Investigator: Juliane Matlach, Dr.         
Sponsors and Collaborators
University Eye Hospital, Würzburg
  More Information

No publications provided

Responsible Party: Juliane Matlach, MD, Dr., University Eye Hospital, Würzburg Identifier: NCT01422525     History of Changes
Other Study ID Numbers: OCT-TET
Study First Received: August 21, 2011
Last Updated: November 13, 2011
Health Authority: Germany: Ethics Commission

Additional relevant MeSH terms:
Nervous System Diseases
Optic Nerve Diseases
Retinal Diseases
Cranial Nerve Diseases
Eye Diseases processed this record on November 27, 2014