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Journal of Ophthalmology
Volume 2011 (2011), Article ID 243170, 4 pages
http://dx.doi.org/10.1155/2011/243170
Clinical Study

Minimizing Surgically Induced Astigmatism at the Time of Cataract Surgery Using a Square Posterior Limbal Incision

1TLC Eyecare & Laser Centers, 1116 W. Ganson, Jackson, MI 49202, USA
2East Valley Ophthalmology, Mesa, AZ 85206, USA
3Science in Vision, Burleson, TX 76028, USA

Received 9 January 2011; Accepted 25 August 2011

Academic Editor: G. L. Spaeth

Copyright © 2011 Paul Ernest et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose. To compare the surgically induced astigmatism from clear corneal and square posterior limbal incisions at the time of cataract surgery. Methods. Surgically induced astigmatism was calculated for a set of eyes after cataract surgery using a temporal 2.2 mm square posterior limbal incision. Results were compared to similar available data from surgeons using clear corneal incisions of similar size. Results. Preoperative corneal astigmatism averaged 1.0 D and was not significantly different between the incision types. Surgically induced astigmatism with the 2.2 mm posterior limbal incision averaged  D, significantly lower in magnitude than the aggregate surgically induced astigmatism produced by the 2.2 mm clear corneal incision (  D). Conclusion. The 2.2 mm square posterior limbal incision induced significantly less, and significantly less variable, surgically induced astigmatism relative to a similar-sized clear corneal incision. This is likely to improve refractive outcomes, particularly important with regard to premium intraocular lenses.