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Effect of the incision site on surgically-induced astigmatism in phacoemulsification cataract surgery

Poster Details

First Author: B.Einollahi IRAN

Co Author(s):    N. Einollahi   J. Rezaei   M. Sadoughi   D. Roshandel   S. Feizi   M. Yaseri     

Abstract Details


To compare the corneal astigmatic outcomes of phacoemulsification cataract surgery with different incision site in patients with low with the rule corneal astigmatism.


Labbafinejad Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.


In this randomized prospective study, we included 93 eyes of 74 patients with corneal with the rule astigmatism less than 1.50 D. All patients underwent phacoemulsification and implantation of a hydrophobic acrylic foldable intraocular lens with different incision sites, group A through steep corneal meridian incision, group B through an oblique clear corneal incision and group C through a temporal clear corneal incision. Preoperative keratometric data were compared with data collected 3 months postoperatively. Vector analysis method was used to calculate the surgical induced astigmatism.


Mean preoperative keratometric astigmatism was 0.79 �Â�± 0.28 D, 0.76 �Â�± 0.43 D and 0.73�Â�± 0.45 D in the steep, oblique and temporal incision groups respectively. Mean keratometric astigmatism was 0.61 �Â�± 0.31 D, 0.58 �Â�± 0.38 D and 0.7 �Â�± 0.3 D at 3 months after surgery in the Steep, oblique and temporal groups respectively. Surgical induced astigmatism at the same follow-up interval was 1.05 �Â�± 0.56 D, 0.96 �Â�± 0.68 D and 1.08 �Â�± 0.63 D Steep, oblique and temporal incision groups respectively.


In patients with with the rule corneal astigmatism under 1.5 D; there is not any statistically significant difference in corneal astigmatism changes and surgical induced astigmatism between Steep, oblique and temporal incision groups.

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