Simple method for accurate alignment in toric phakic and aphakic intraocular lens implantation
A simple technique for the accurate surgical alignment of toric phakic and aphakic intraocular lenses (IOLs) is described. The mathematical relationship between toric misalignment and cylinder error is reviewed to demonstrate the importance of toric lens alignment in the setting of increased rotational stability with newer generation lenses. A formula for calculating the exact lens misalignment given a manifest cylinder is also presented.
From the Department of Ophthalmology (Ma), Faculty of Medicine, University of Toronto, Branson Eye Center (Ma), North York General Hospital, Herzig Eye Institute (Ma), Veritas Eye Institute (Ma, Tseng), and the Department of Vision Science (Tseng), Chung Shan Medical University, Taichung, Taiwan
Corresponding author: Joseph J.K. Ma, MD, FRCSC, 500 Sheppard Avenue East, Suite 305, Toronto, Ontario, Canada M2N 6H7.
Neither author has a financial or proprietary interest in any material or method mentioned.
Presented in part at the XXV Congress of the European Society of Cataract and Refractive Surgeons, Stockholm, Sweden, September 2007; and the 12th ESCRS Winter Refractive Surgery Meeting, Barcelona, Spain, February 2008.
Supported by funding from The Cornea and Vision Science Foundation and The Eye Foundation of Canada, Toronto, Canada.
Dominik Podbielski and Rustin Floyd assisted with this project.
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