@article{AES4388,
author = {Diana Silva and Mafalda Mota and Catarina Pedrosa and Peter Pêgo and Sara Pinto and Cristina Vendrell and Isabel Prieto},
title = {Posterior corneal astigmatism modifications after cataract surgery and its role on total corneal astigmatism},
journal = {Annals of Eye Science},
volume = {3},
number = {7},
year = {2018},
keywords = {},
abstract = {Background: In recent years posterior corneal astigmatism and its effect on total corneal astigmatism has been studied, with research showing that this can impact total astigmatism. This study aims to ascertain if there is significant change in the posterior corneal astigmatism after cataract surgery and its impact on the total astigmatism.
Methods: Analysis of 76 eyes that underwent cataract surgery with monofocal intraocular lens implantation. Corneal topography was performed with Pentacam (OCULUS®) pre- and post-operatively. Total corneal astigmatism was calculated with the algorithm of vergence tracing. We compared preoperative and postoperative changes in the magnitude and axis differences of anterior corneal curvature astigmatism, posterior corneal curvature astigmatism and the calculated total corneal astigmatism. We calculated the correlation between the total preoperative astigmatism and the difference between total corneal astigmatism and anterior corneal astigmatism.
Results: The mean preoperative and postoperative posterior astigmatism was 0.31±0.02 D, showing no significant differences before and after surgery (P=0.989). Statistically significant differences between the calculated total corneal astigmatism and anterior corneal astigmatism were registered preoperatively and postoperatively in the with-the-rule anterior (WTR) corneal astigmatism (P=0.004, P},
issn = {2520-4122}, url = {https://aes.amegroups.org/article/view/4388}
}