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Comparison of surgically induced astigmatism between one-handed and two-handed cataract surgery techniques

Authors Kawahara A, Kurosaka D, Yoshida A

Received 2 August 2013

Accepted for publication 10 September 2013

Published 2 October 2013 Volume 2013:7 Pages 1967—1972

DOI https://doi.org/10.2147/OPTH.S52415

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Atsushi Kawahara,1 Daijiro Kurosaka,2 Akitoshi Yoshida3

1Department of Ophthalmology, Sapporo Tokushukai Hospital, Sapporo, 2Department of Ophthalmology, Iwate Medical University, Morioka, 3Department of Ophthalmology, Asahikawa Medical University, Asahikawa, Japan

Background: The purpose of this study was to compare surgically induced astigmatism (SIA) between one-handed and two-handed cataract surgery techniques.
Methods: Eighty-eight eyes of 44 patients with no ocular disease other than cataract, who underwent cataract surgery by a single surgeon, were selected for this study. Cataract surgery was performed by coaxial phacoemulsification and intraocular lens implantation via a 2.4 mm transconjunctival single-plane sclerocorneal incision at the 12 o'clock position. In each patient, one eye was subjected to coaxial phacoemulsification using a one-handed technique while the fellow eye was subjected to coaxial phacoemulsification using a two-handed technique. For the two-handed technique, a corneal side port was created at the 2 o'clock position. The appropriate incision meridian was identified by a preoperative axis mark. SIA was calculated using the Alpins method.
Results: Mean SIA was 0.40 ± 0.28 diopters (D) in the one-handed technique group and 0.39 ± 0.25 D in the two-handed technique group. No statistically significant difference was found in the mean SIA score. The mean torque value was −0.05 ± 0.26 D in the one-handed technique group and 0.11 ± 0.37 D in the two-handed technique group. Mean torque was significantly lower (P<0.05) in the one-handed technique group than in the two-handed technique group.
Conclusion: The results indicate that the corneal side port in two-handed cataract surgery has a rotating effect on the axis of astigmatism.

Keywords:
cataract surgery, corneal side port, surgically induced astigmatism

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