Wavefront and ocular spherical aberration after implantation of different types of aspheric intraocular lenses based on corneal spherical aberration.

BACKGROUND: To determine the ocular spherical aberration after using preoperative corneal spherical aberration guided aspheric IOL selection for cataract surgery. MATERIAL AND METHOD: Twenty-six eyes of cataract patients were scheduled for cataract surgery with aspheric IOL implantation based on preoperative corneal spherical aberration (SA) measured by Galilei corneal topography. The target postoperative total wavefront spherical aberration was zero. Three types of LOL were used in this study: TecnisZA9003 (Abbott Medical Optics Inc) with spherical aberration of -0.27 microm; Acrysof LQ SN60WF (Alcon Inc.) with spherical aberration of -0.20 microm and B&L Akreos with zero spherical aberration. Ocular spherical aberration was measured with a Wave Light machine 3 months postoperatively to demonstrate the total ocular spherical aberration. RESULTS: The preoperative mean corneal spherical aberration in the 3 groups was 0.351 +/- 0.08, 0.181 +/- 0.04, and 0.056 +/- 0.03 microns respectively. All 26 eyes of 26 patients completed the 3-month follow-up visit. Postoperative ocular spherical aberration of the 3 groups were: TecnisZA9003 (10 eyes) +0.023 +/- 0.011 microm; Acrysof IQ SN60WF (11 eyes) +0.045 +/- 0.018 microm; and B&L Akreos (5 eyes) +0.018 +/- 0.008 microm. These values were significantly lower than the predicted values in the Tecnis and Akreos groups and there was no correlation between the actual postoperative ocular spherical aberration and the predicted ocular spherical aberration in all groups. CONCLUSION: The implantation of an aspheric intraocular lens based on preoperative corneal spherical aberration is effective in reducing total ocular spherical aberration and improving visual function.