{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,3,30]],"date-time":"2025-03-30T19:45:49Z","timestamp":1743363949964,"version":"3.37.3"},"reference-count":42,"publisher":"Georg Thieme Verlag KG","issue":"02","license":[{"start":{"date-parts":[[2023,9,18]],"date-time":"2023-09-18T00:00:00Z","timestamp":1694995200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Klin Monbl Augenheilkd"],"published-print":{"date-parts":[[2024,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>\n          Aim To evaluate the accuracy of the raytracing method for the calculation of\n          intraocular lens (IOL) power in myopic eyes after small incision extraction of the\n          lenticule (SMILE).<\/jats:p><jats:p>\n          Methods Retrospective study. All patients undergoing surgery for myopic SMILE\n          between May 1, 2020, and December 31, 2020, with Scheimpflug tomography optical biometry\n          were eligible for inclusion. Manifest refraction was performed before and 6 months after\n          refractive surgery. One eye from each patient was included in the final analysis. A\n          theoretical model was invited to predict the accuracy of multiple methods of lens power\n          calculation by comparing the IOL-induced refractive error at the corneal plane (IOL-Dif)\n          and the SMILE-induced change of spherical equivalent (SMILE-Dif) before and after SMILE\n          surgery. The prediction error (PE) was calculated as the difference between\n          SMILE-Dif\u2013IOL-Dif. IOL power calculations were performed using raytracing (Olsen\n          Raytracing, Pentacam AXL, software version 1.22r05, Wetzlar, Germany) and other formulae\n          with historical data (Barrett True-K, Double-K SRK\/T, Masket, Modified Masket) and without\n          historical data (Barrett True-K no history, Haigis-L, Hill Potvin Shammas PM, Shammas-PL)\n          for the same IOL power and model. In addition, subgroup analysis was performed in\n          different anterior chamber depths, axial lengths, back-to-front corneal radius ratio,\n          keratometry, lens thickness, and preoperative spherical equivalents.<\/jats:p><jats:p>\n          Results A total of 70 eyes of 70 patients were analyzed. The raytracing method had\n          the smallest mean absolute PE (0.26\u2009\u00b1\u20090.24\u2009D) and median absolute PE (0.16\u2009D), and also\n          had the largest percentage of eyes within a PE of \u00b1\u20090.25\u2009D (64.3%), \u00b1\u20090.50\u2009D (81.4%),\n          \u00b1\u20090.75\u2009D (95.7%), and \u00b1\u20091.00\u2009D (100.0%). The raytracing method was significantly better\n          than Double-K SRK\/T, Haigis, Haigis-L, and Shammas-PL formulae in postoperative refraction\n          prediction (all p\u2009&lt;\u20090.001), but not better than the following formulae: Barrett True-K\n          (p\u2009=\u20090.314), Barrett True-K no history (p\u2009=\u20090.163), Masket (p\u2009=\u20091.0), Modified Masket\n          (p\u2009=\u20090.806), and Hill Potvin Shammas PM (p\u2009=\u20090.286). Subgroup analysis showed that\n          refractive outcomes exhibited no statistically significant differences in the raytracing\n          method (all p\u2009&lt;\u20090.05).<\/jats:p><jats:p>\n          Conclusion Raytracing was the most accurate method in predicting target refraction\n          and had a good consistency in calculating IOL power for myopic eyes after SMILE.<\/jats:p>","DOI":"10.1055\/a-2177-4998","type":"journal-article","created":{"date-parts":[[2023,9,18]],"date-time":"2023-09-18T23:06:21Z","timestamp":1695078381000},"page":"221-229","source":"Crossref","is-referenced-by-count":1,"title":["Theoretical Accuracy of the Raytracing Method for Intraocular Calculation of\n          Lens Power in Myopic Eyes after Small Incision Extraction of the Lenticule"],"prefix":"10.1055","volume":"241","author":[{"given":"Yinjuan","family":"Wei","sequence":"first","affiliation":[{"name":"Department of Cataract, Tianjin Eye Hospital, Tianjin, China"},{"name":"Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin,\n          China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7918-9683","authenticated-orcid":false,"given":"Yianzhu","family":"Liu","sequence":"first","affiliation":[{"name":"Department of Cataract, Tianjin Eye Hospital, Tianjin, China"},{"name":"Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin,\n          China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongyu","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Chinese PLA General Hospital, Beijing,\n          China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hui","family":"Song","sequence":"additional","affiliation":[{"name":"Department of Cataract, Tianjin Medical University Eye Hospital, Tianjin,\n          China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2023,11,23]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"759","DOI":"10.1016\/j.jcrs.2009.01.005","article-title":"Intraocular lens power calculation after previous laser refractive surgery","volume":"35","author":"K J Hoffer","year":"2009","journal-title":"J Cataract Refract Surg"},{"key":"ref2","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1097\/00055735-200402000-00002","article-title":"Difficult lens power calculations","volume":"15","author":"A Langenbucher","year":"2004","journal-title":"Curr Opin Ophthalmol"},{"key":"ref3","doi-asserted-by":"publisher","first-page":"18","DOI":"10.1186\/s40662-018-0110-5","article-title":"Intraocular lens power calculation in eyes with previous corneal refractive surgery","volume":"5","author":"G Savini","year":"2018","journal-title":"Eye Vis (Lond)"},{"key":"ref4","doi-asserted-by":"publisher","first-page":"479","DOI":"10.3341\/kjo.2016.0078","article-title":"Intraocular Lens Power Calculation after Refractive Surgery: A Comparative Analysis of\n          Accuracy and Predictability","volume":"31","author":"B S Kang","year":"2017","journal-title":"Korean J Ophthalmol"},{"key":"ref5","doi-asserted-by":"publisher","first-page":"363","DOI":"10.1016\/j.jcrs.2015.11.039","article-title":"Accuracy of the Barrett True-K formula for intraocular lens power prediction after laser\n          in situ keratomileusis or photorefractive keratectomy for myopia","volume":"42","author":"A Abulafia","year":"2016","journal-title":"J Cataract Refract Surg"},{"key":"ref6","doi-asserted-by":"publisher","first-page":"430","DOI":"10.1016\/j.jcrs.2005.12.106","article-title":"Simple regression formula for intraocular lens power adjustment in eyes requiring\n          cataract surgery after excimer laser photoablation","volume":"32","author":"S Masket","year":"2006","journal-title":"J Cataract Refract Surg"},{"key":"ref7","doi-asserted-by":"publisher","first-page":"2063","DOI":"10.1016\/s0886-3350(03)00957-x","article-title":"Intraocular lens power calculation after corneal refractive surgery: double-K\n          method","volume":"29","author":"J Aramberri","year":"2003","journal-title":"J Cataract Refract Surg"},{"key":"ref8","doi-asserted-by":"publisher","first-page":"1271","DOI":"10.1016\/j.ophtha.2006.03.024","article-title":"Intraocular lens power calculation after myopic refractive surgery: theoretical\n          comparison of different methods","volume":"113","author":"G Savini","year":"2006","journal-title":"Ophthalmology"},{"key":"ref9","doi-asserted-by":"publisher","first-page":"490","DOI":"10.3928\/1081-597X-19951101-17","article-title":"Intraocular lens power calculation for eyes after refractive keratotomy","volume":"11","author":"K J Hoffer","year":"1995","journal-title":"J Refract Surg"},{"key":"ref10","doi-asserted-by":"publisher","first-page":"589","DOI":"10.1016\/j.jcrs.2011.11.025","article-title":"Intraocular lens power calculation after previous myopic laser vision correction based\n          on corneal power measured by Fourier-domain optical coherence tomography","volume":"38","author":"M Tang","year":"2012","journal-title":"J Cataract Refract Surg"},{"key":"ref11","doi-asserted-by":"publisher","first-page":"56","DOI":"10.1016\/j.ophtha.2013.08.041","article-title":"Intraoperative refractive biometry for predicting intraocular lens power calculation\n          after prior myopic refractive surgery","volume":"121","author":"T Ianchulev","year":"2014","journal-title":"Ophthalmology"},{"key":"ref12","doi-asserted-by":"publisher","first-page":"339","DOI":"10.1016\/j.jcrs.2014.05.040","article-title":"New algorithm for intraocular lens power calculations after myopic laser in situ\n          keratomileusis based on rotating Scheimpflug camera 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Melles","year":"2018","journal-title":"Ophthalmology"},{"key":"ref16","doi-asserted-by":"publisher","first-page":"2443","DOI":"10.1016\/j.ophtha.2015.08.037","article-title":"Comparison of Newer Intraocular Lens Power Calculation Methods for Eyes after Corneal\n          Refractive Surgery","volume":"122","author":"L Wang","year":"2015","journal-title":"Ophthalmology"},{"key":"ref17","doi-asserted-by":"publisher","first-page":"1096","DOI":"10.1016\/j.ophtha.2015.01.027","article-title":"Comparison of Intraoperative Aberrometry, OCT-Based IOL Formula, Haigis-L, and Masket\n          Formulae for IOL Power Calculation after Laser Vision Correction","volume":"122","author":"N R Fram","year":"2015","journal-title":"Ophthalmology"},{"key":"ref18","doi-asserted-by":"publisher","first-page":"150","DOI":"10.1016\/j.ajo.2013.08.006","article-title":"Intraocular lens power calculation by ray-tracing after myopic excimer laser\n          surgery","volume":"157","author":"G Savini","year":"2014","journal-title":"Am J Ophthalmol"},{"key":"ref19","doi-asserted-by":"publisher","first-page":"276","DOI":"10.1007\/s10384-014-0304-x","article-title":"Ray tracing software for intraocular lens power calculation after corneal excimer laser\n          surgery","volume":"58","author":"M Saiki","year":"2014","journal-title":"Jpn J Ophthalmol"},{"key":"ref20","doi-asserted-by":"publisher","first-page":"333","DOI":"10.1016\/s0886-3350(13)80705-5","article-title":"Development of the SRK\/T intraocular lens implant power calculation formula","volume":"16","author":"J A Retzlaff","year":"1990","journal-title":"J Cataract Refract Surg"},{"key":"ref21","doi-asserted-by":"publisher","first-page":"764","DOI":"10.1016\/j.jcrs.2013.10.037","article-title":"C constant: new concept for ray tracing-assisted intraocular lens power calculation","volume":"40","author":"T Olsen","year":"2014","journal-title":"J Cataract Refract Surg"},{"key":"ref22","doi-asserted-by":"publisher","first-page":"1758","DOI":"10.1016\/j.jcrs.2012.05.035","article-title":"Ray-tracing intraocular lens power calculation using anterior segment optical coherence\n          tomography measurements","volume":"38","author":"K Minami","year":"2012","journal-title":"J Cataract Refract Surg"},{"key":"ref23","doi-asserted-by":"publisher","first-page":"697","DOI":"10.1038\/sj.eye.6702300","article-title":"Intraocular lens power calculation using ray tracing following excimer laser\n          surgery","volume":"21","author":"T M Rabsilber","year":"2007","journal-title":"Eye (Lond)"},{"key":"ref24","doi-asserted-by":"publisher","first-page":"304","DOI":"10.1097\/j.jcrs.0000000000000405","article-title":"Predictability of intraocular lens power calculation after small-incision lenticule\n          extraction for myopia","volume":"47","author":"A Lazaridis","year":"2021","journal-title":"J Cataract Refract Surg"},{"key":"ref25","doi-asserted-by":"publisher","first-page":"403","DOI":"10.1016\/j.ajo.2015.05.029","article-title":"Protocols for studies of intraocular lens formula accuracy","volume":"160","author":"K J Hoffer","year":"2015","journal-title":"Am J Ophthalmol"},{"key":"ref26","doi-asserted-by":"publisher","first-page":"224","DOI":"10.1080\/08820538.2020.1807028","article-title":"Advantages of Small Incision Lenticule Extraction (SMILE) for Mass Eye and Ear Special\n          Issue","volume":"35","author":"A A Ahmed","year":"2020","journal-title":"Semin Ophthalmol"},{"key":"ref27","doi-asserted-by":"publisher","first-page":"1109","DOI":"10.1016\/j.jcrs.2013.11.032","article-title":"Corneal ray tracing versus simulated keratometry for estimating corneal power changes\n          after excimer laser surgery","volume":"40","author":"G Savini","year":"2014","journal-title":"J Cataract Refract Surg"},{"key":"ref28","doi-asserted-by":"publisher","first-page":"832","DOI":"10.3928\/1081597X-20200930-02","article-title":"IOL Power Calculation After Radial Keratotomy Using the Haigis and Barrett True-K\n          Formulas","volume":"36","author":"R Leite de Pinho Tavares","year":"2020","journal-title":"J Refract Surg"},{"key":"ref29","doi-asserted-by":"publisher","first-page":"60","DOI":"10.3928\/1081597X-20201030-02","article-title":"Accuracy of Intraoperative Aberrometry, Barrett True-K With and Without Posterior Cornea\n          Measurements, Shammas-PL, and Haigis-L Formulas After Myopic Refractive Surgery","volume":"37","author":"K L Christopher","year":"2021","journal-title":"J Refract Surg"},{"key":"ref30","doi-asserted-by":"publisher","first-page":"37","DOI":"10.1186\/s40662-020-00188-1","article-title":"Accuracy of intraocular lens power calculation formulae after laser refractive surgery\n          in myopic eyes: a meta-analysis","volume":"7","author":"H Li","year":"2020","journal-title":"Eye Vis (Lond)"},{"key":"ref31","doi-asserted-by":"publisher","first-page":"557","DOI":"10.3928\/1081597X-20120723-04","article-title":"Comparison of keratometric data obtained by automated keratometer, Dicon CT 200, Allegro\n          Topolyzer, and Pentacam","volume":"28","author":"T Gonen","year":"2012","journal-title":"J Refract Surg"},{"key":"ref32","doi-asserted-by":"publisher","first-page":"8992","DOI":"10.1038\/s41598-020-65827-y","article-title":"New method for intraocular lens power calculation using a rotating Scheimpflug camera in\n          eyes with corneal refractive surgery","volume":"10","author":"K Cho","year":"2020","journal-title":"Sci Rep"},{"key":"ref33","first-page":"34","article-title":"Optical coherence tomography-based corneal power measurement and intraocular lens power\n          calculation following laser vision correction (an American Ophthalmological Society\n          thesis)","volume":"111","author":"D Huang","year":"2013","journal-title":"Trans Am Ophthalmol Soc"},{"key":"ref34","doi-asserted-by":"publisher","first-page":"85","DOI":"10.1159\/000507963","article-title":"Accuracy of Constant C for Ray Tracing: Assisted Intraocular Lens Power Calculation in\n          Normal Ocular Axial Eyes","volume":"64","author":"P J Chang","year":"2021","journal-title":"Ophthalmic Res"},{"key":"ref35","doi-asserted-by":"publisher","first-page":"261","DOI":"10.1097\/ICO.0000000000000034","article-title":"Evaluation of the Pentacam ray tracing method for the measurement of central corneal\n          power after myopic photorefractive keratectomy","volume":"33","author":"J H Oh","year":"2014","journal-title":"Cornea"},{"key":"ref36","doi-asserted-by":"publisher","first-page":"1016","DOI":"10.1167\/iovs.17-22405","article-title":"Use of the Posterior\/Anterior Corneal Curvature Radii Ratio to Improve the Accuracy of\n          Intraocular Lens Power Calculation: Eom\u02bcs Adjustment Method","volume":"59","author":"M Kim","year":"2018","journal-title":"Invest Ophthalmol Vis Sci"},{"key":"ref37","doi-asserted-by":"publisher","first-page":"63","DOI":"10.1016\/j.joco.2017.06.008","article-title":"Comparison of OKULIX ray-tracing software with SRK-T and Hoffer-Q formula in intraocular\n          lens power calculation","volume":"30","author":"M Ghoreyshi","year":"2018","journal-title":"J Curr Ophthalmol"},{"key":"ref38","doi-asserted-by":"publisher","first-page":"641","DOI":"10.1016\/j.jcrs.2011.10.035","article-title":"Ray-tracing analysis of intraocular lens power in situ","volume":"38","author":"T Olsen","year":"2012","journal-title":"J Cataract Refract Surg"},{"key":"ref39","doi-asserted-by":"publisher","first-page":"1030","DOI":"10.1016\/j.jcrs.2014.07.044","article-title":"Effect of the equivalent refractive index on intraocular lens power prediction with ray\n          tracing after myopic laser in situ keratomileusis","volume":"41","author":"C Canovas","year":"2015","journal-title":"J Cataract Refract Surg"},{"key":"ref40","doi-asserted-by":"publisher","first-page":"845","DOI":"10.2147\/OPTH.S298007","article-title":"Refractive Precision of Ray Tracing IOL Calculations Based on OCT Data versus\n          Traditional IOL Calculation Formulas Based on Reflectometry in Patients with a History of\n          Laser Vision Correction for Myopia","volume":"15","author":"B Gjerdrum","year":"2021","journal-title":"Clin Ophthalmol"},{"key":"ref41","doi-asserted-by":"publisher","first-page":"4418","DOI":"10.3390\/jcm11154418","article-title":"IOL Power Calculations and Cataract Surgery in Eyes with Previous Small Incision\n          Lenticule Extraction","volume":"11","author":"R Lischke","year":"2022","journal-title":"J Clin Med"},{"key":"ref42","doi-asserted-by":"publisher","first-page":"560","DOI":"10.18240\/ijo.2020.04.05","article-title":"Stability of the Barrett True-K formula for intraocular lens power calculation after\n          SMILE in Chinese myopic eyes","volume":"13","author":"W Zhu","year":"2020","journal-title":"Int J Ophthalmol"}],"container-title":["Klinische Monatsbl\u00e4tter f\u00fcr Augenheilkunde"],"original-title":[],"language":"de","link":[{"URL":"http:\/\/www.thieme-connect.de\/products\/ejournals\/pdf\/10.1055\/a-2177-4998.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,11,5]],"date-time":"2024-11-05T17:15:36Z","timestamp":1730826936000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.thieme-connect.de\/DOI\/DOI?10.1055\/a-2177-4998"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,9,18]]},"references-count":42,"journal-issue":{"issue":"02","published-online":{"date-parts":[[2024,2,27]]},"published-print":{"date-parts":[[2024,2]]}},"URL":"https:\/\/doi.org\/10.1055\/a-2177-4998","archive":["Portico","CLOCKSS"],"relation":{},"ISSN":["0023-2165","1439-3999"],"issn-type":[{"type":"print","value":"0023-2165"},{"type":"electronic","value":"1439-3999"}],"subject":[],"published-other":{"date-parts":[[2023,9,18]]},"published":{"date-parts":[[2023,9,18]]}}}