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Study defines causes of astigmatic surprise after toric IOL implantation
Understanding the root causes of refractive cylinder surprises that manifest after toric IOL implantation can enable surgeons to choose appropriate surgical methods for each patient’s individual case, according to a study.The experimental study set out to define these causes by using vergence formulas to bring all lens powers to the corneal plane. The refractive cylinder effect of rotating a toric IOL and demonstrating how prevailing astigmatism and various planning and surgical steps contribute to postoperative refractive cylinder were determined by double-angle vector diagrams.