{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T06:53:39Z","timestamp":1787727219837,"version":"build-2784847793"},"reference-count":12,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2023,7,7]],"date-time":"2023-07-07T00:00:00Z","timestamp":1688688000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>The ratio of posterior-to-anterior curvature radii of the cornea (P\/A ratio) is an important element in determining corneal refractive power. P\/A ratio has been well studied in patients prior to undergoing refractive surgery, but its postoperative value remains less so. We aimed to examine the value of preoperative characteristics of refractive surgery patients in predicting the 1-year postoperative P\/A ratio in LASIK, PRK, and SMILE using both linear and multivariate regression analyses. This was a retrospective study that included patients with manifest refraction spherical equivalents (MRSE) from \u22127.71D to \u22120.25D. In total, 164 eyes underwent LASIK, 183 underwent PRK, and 46 underwent SMILE. All patients had preoperative and 1-year postoperative front sagittal and back sagittal keratometry measurements at 4, 5, and 6 mm around the corneal vertex. Postoperative P\/A after LASIK, PRK, and SMILE was found to be significantly correlated with MRSE and preoperative P\/A. Stepwise variable selection in multivariate regression revealed that spherical equivalent was the most significant predictor of postoperative P\/A. When coupled with other preoperative characteristics, including P\/A, age, asphericity, and keratometry, the multivariate regressions were able to produce models with high predictive value in LASIK (adjusted R2: 0.957), PRK (adjusted R2: 0.934), and SMILE (adjusted R2: 0.894).<\/jats:p>","DOI":"10.3390\/jcm12134536","type":"journal-article","created":{"date-parts":[[2023,7,7]],"date-time":"2023-07-07T01:57:09Z","timestamp":1688695029000},"page":"4536","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Prediction of Posterior-to-Anterior Corneal Curvature Radii Ratio in Myopic Patients after LASIK, SMILE, and PRK Using Multivariate Regression Analysis"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5719-422X","authenticated-orcid":false,"given":"David","family":"Cha","sequence":"first","affiliation":[{"name":"School of Medicine, Saint Louis University, Saint Louis, MO 63104, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1024-6250","authenticated-orcid":false,"given":"Majid","family":"Moshirfar","sequence":"additional","affiliation":[{"name":"Hoopes Vision Research Center, Hoopes Vision, Draper, UT 84020, USA"},{"name":"John A. Moran Eye Center, University of Utah School of Medicine, Salt Lake City, UT 84132, USA"},{"name":"Utah Lions Eye Bank, Murray, UT 84107, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5357-7661","authenticated-orcid":false,"given":"Michael","family":"Herron","sequence":"additional","affiliation":[{"name":"University of Nevada, Reno School of Medicine, Reno, NV 89557, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jordan","family":"Santos","sequence":"additional","affiliation":[{"name":"University of Arizona College of Medicine Phoenix, Phoenix, AZ 85004, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Phillip","family":"Hoopes","sequence":"additional","affiliation":[{"name":"Hoopes Vision Research Center, Hoopes Vision, Draper, UT 84020, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"368","DOI":"10.1016\/j.jcrs.2007.10.031","article-title":"Sources of error in intraocular lens power calculation","volume":"34","author":"Norrby","year":"2008","journal-title":"J. Cataract Refract. Surg."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1534","DOI":"10.1016\/j.ophtha.2008.02.020","article-title":"Sensitivity and specificity of posterior corneal elevation measured by Pentacam in discriminating keratoconus\/subclinical keratoconus","volume":"115","author":"Loiacono","year":"2008","journal-title":"Ophthalmology"},{"key":"ref_3","first-page":"241","article-title":"Comparative Analysis of LASIK Flap Diameter and its Centration Using Two Different Femtosecond Lasers","volume":"8","author":"Moshirfar","year":"2019","journal-title":"Med. Hypothesis Discov. Innov. 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Surg."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1065","DOI":"10.1007\/s00417-019-04566-x","article-title":"Using the posterior to anterior corneal curvature radii ratio to minimize the risk of a postoperative hyperopic shift after Descemet membrane endothelial keratoplasty","volume":"258","author":"Diener","year":"2020","journal-title":"Graefe\u2019s Arch. Clin. Exp. Ophthalmol."}],"container-title":["Journal of Clinical Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2077-0383\/12\/13\/4536\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T20:07:48Z","timestamp":1760126868000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2077-0383\/12\/13\/4536"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,7,7]]},"references-count":12,"journal-issue":{"issue":"13","published-online":{"date-parts":[[2023,7]]}},"alternative-id":["jcm12134536"],"URL":"https:\/\/doi.org\/10.3390\/jcm12134536","relation":{},"ISSN":["2077-0383"],"issn-type":[{"value":"2077-0383","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,7,7]]}}}