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.