Methodological study demonstrates an alignment technique and calculation formula for toric intraocular lens implantation, indicating precise positioning minimizes postoperative astigmatism.
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.
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J.K. et al. (2008) studied this question.
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