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Evolution of induced corneal astigmatism after canaloplasty

Poster Details

First Author: M.Lazickagalecka POLAND

Co Author(s):    A. Kaminska   T. Galecki   M. Udzielaaffiliation   J. Szaflik     

Abstract Details


To evaluate the changes in corneal astigmatism after canaloplasty and to analyze its correlation with intraocular pressure.


Department of Ophthalmology Medical University of Warsaw, Poland Head: Professor Jerzy Szaflik, MD, PhD


: Retrospective analysis of 43 consecutive patients with open-angle glaucoma undergoing canaloplasty. Canaloplasty comprised of 360-degree catheterisation of Schlemm canal by means of a flexible microcatheter with distension of the canal by 2 tensioning 10-0 polypropylene sutures. Primary outcome measures included IOP, glaucoma medication usage, astigmatism, and adverse events at 1, 4 weeks and 6, 12 months postoperatively.


The mean preoperative IOP was 24.1±3.6 mm Hg. The mean IOP decreased to 12.25 ±2.3 mm Hg at 12 months. Mean astigmatism preoperatively was 0.93±0.9 D, which increased to 5.3±1.7 D at 1 week postoperatively (P≤0.05; Wilcoxon-test). Thereafter, the astigmatism underwent a spontaneous decline, reaching 3.9±0.8 D at 4 weeks, 1.2 ±0.74 D at 6 months and 1.1±0.63 D at 12 months postoperatively. Best-corrected visual acuity did not change significantly. Six months after canaloplasty, mean astigmatism reached the preoperative range of 0.96±0.52 D. Astigmatism at 1 weeks correlated significantly and inversely with IOP at 12 months (r=0.58, P=0.005; Spearman).


The induced astigmatism after canaloplasty reached maximum at 1 week postoperatively and reached preoperative values at 12 months. The amount of surgically induced astigmatism might be helpful to predict outcome of canaloplasty in IOP reduction. FINANCIAL INTEREST: NONE

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