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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



Purpose:

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

Setting:

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

Methods:

: 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.

Results:

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).

Conclusions:

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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