{"title":"Comparison of various spherical aberration compensation methods in pseudophakic eyes.","authors":"J Rozema, M J Tassignon","doi":"","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>To provide a numerical comparison of the efficiency of spherical aberration (SA) compensation methods commonly used in commercial aspheric intraocular lenses (IOLs).</p><p><strong>Methods: </strong>Numerical simulations were performed using the wavefront data of 139 right eyes implanted with a spherical Morcher 89A (\"Bag-in-the-Lens\") IOL. Simulations were done for spherical, constant aspherical and SA-free IOLs, as well as for the customized selection method.</p><p><strong>Results: </strong>Constant aspherical IOLs bought 49.6% of the eyes to a targeted postoperative SA value +/- 0.05 microm, while zero-SA IOLs brought 61.2% of the eyes to this range. However with customized selection 95% of the eyes could be brought to this target, resulting in more control over the postoperative spherical aberration. If no aspherical correction was used, only 8.6% of the eyes could reach the set target.</p><p><strong>Conclusion: </strong>These numerical results suggest that IOLs with an asphericity as a function of IOL power, supplemented by a customized selection from a number of fixed SA values according to preoperative corneal SA, may provide sufficient control over the postoperative SA. Given the surgeon centration possibility of the Bag-in-the-Lens IOL used in this study, as well as its centration stability, this is an ideal lens to implement the customized selection method.</p>","PeriodicalId":9308,"journal":{"name":"Bulletin de la Societe belge d'ophtalmologie","volume":" 316","pages":"7-15"},"PeriodicalIF":0.0000,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin de la Societe belge d'ophtalmologie","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Purpose: To provide a numerical comparison of the efficiency of spherical aberration (SA) compensation methods commonly used in commercial aspheric intraocular lenses (IOLs).
Methods: Numerical simulations were performed using the wavefront data of 139 right eyes implanted with a spherical Morcher 89A ("Bag-in-the-Lens") IOL. Simulations were done for spherical, constant aspherical and SA-free IOLs, as well as for the customized selection method.
Results: Constant aspherical IOLs bought 49.6% of the eyes to a targeted postoperative SA value +/- 0.05 microm, while zero-SA IOLs brought 61.2% of the eyes to this range. However with customized selection 95% of the eyes could be brought to this target, resulting in more control over the postoperative spherical aberration. If no aspherical correction was used, only 8.6% of the eyes could reach the set target.
Conclusion: These numerical results suggest that IOLs with an asphericity as a function of IOL power, supplemented by a customized selection from a number of fixed SA values according to preoperative corneal SA, may provide sufficient control over the postoperative SA. Given the surgeon centration possibility of the Bag-in-the-Lens IOL used in this study, as well as its centration stability, this is an ideal lens to implement the customized selection method.