Fig. 2From: Clinical evaluation of toric intraocular lens implantation based on iTrace wavefront keratometric astigmatismSingle-angle polar plots for the a target induced astigmatism vector, b surgically induced astigmatism vector, c difference vector, and d correction index are shown. The vector means are plotted as a red cross (calculated in double-angle vector space) and the standard deviations (SDs) for the X and Y axes are displayed in the call-out box. D, dioptersBack to article page