The purpose of this study is to perform trabeculopuncture a test to determine the distal outflow tract function to predict the success of ab interno trabeculectomy.
The aim of this study is to develop a non-invasive predictive test for the function of the distal outflow tract after ab interno trabeculectomy for open angle glaucoma. We hypothesize that the ocular pressure drop and outflow change after preoperative trabeculectomy may predict the success of ab interno trabeculectomy. The results of this study should allow trabeculopuncture to be used to select the most appropriate procedure for the individual patient.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
55
Trabeculopuncture is performed with a Nd:YAG laser on the trabecular meshwork. Four punctures are created along the 180° nasal trabecular meshwork.
Uniklinikum Würzburg
Würzburg, Bavaria, Germany
RECRUITINGIOP
Intraocular pressure measured by Goldmann applanation tonometry
Time frame: before and two hours after trabeculopuncture, one and four weeks postoperatively (after ab interno trabeculectomy), and three months postoperatively
Outflow facility
Outflow facility is measured by the use of a pneumatonometer
Time frame: before and two hours after trabeculopuncture, one and four weeks postoperatively (after ab interno trabeculectomy), and three months postoperatively
Surgical success
surgical success at month three is defined as 20% IOP reduction without increasing the number of glaucoma drops
Time frame: at month three
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