{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T11:01:36Z","timestamp":1790247696498,"version":"4.1.0"},"reference-count":18,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T00:00:00Z","timestamp":1774483200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Ophthalmol."],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>This study aimed to validate a regression-based keratometric prediction model in eyes with pterygium using actual postoperative refractive outcomes after cataract surgery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A retrospective paired analysis was performed in 20 unilateral eyes that underwent staged cataract surgery following pterygium excision. Predicted K values were calculated using a previously reported regression model based on CASIA2 anterior segment parameters. Intraocular lens (IOL) power was calculated using the Barrett Universal II formula. Mean K, spherical equivalent, refractive error, and absolute refractive error were compared among four keratometric methods (postoperative K, predicted K, preoperative K, and fellow-eye K) using the Friedman test followed by Bonferroni-adjusted Wilcoxon signed-rank tests. Sensitivity analyses were conducted after exclusion of toric IOL cases. Exploratory receiver operating characteristic analyses were performed to assess the influence of preoperative corneal parameters.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Overall differences among the four methods were significant for mean K (p &amp;lt; 0.0001), spherical equivalent (p = 0.0003), refractive error (p = 0.001), and absolute refractive error (p = 0.014). However, no statistically significant differences were observed between postoperative K and predicted K in any parameter. Sensitivity analyses yielded consistent findings. Exploratory analyses suggested that preoperative corneal characteristics may influence refractive predictability.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In this paired analysis of 20 unilateral eyes, regression-based K estimation demonstrated refractive performance comparable to postoperative keratometry. These findings support the potential clinical utility of prediction-based keratometry as a practical alternative when postoperative K values are unavailable, although confirmation in larger prospective studies is required.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fopht.2026.1759853","type":"journal-article","created":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T05:28:07Z","timestamp":1774502887000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Refractive outcomes after cataract surgery in eyes with pterygium: validation of a regression-based keratometric prediction model"],"prefix":"10.3389","volume":"6","author":[{"given":"Keiji","family":"Sato","sequence":"first","affiliation":[{"name":"Department of Ophthalmology, Kozawa Eye Hospital and Diabetes Center","place":["Mito, Ibaraki, Japan"]},{"name":"Department of Ophthalmology, St. Marianna University School of Medicine","place":["Kawasaki, Kanagawa, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ayaka","family":"Kawamatsu","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Kozawa Eye Hospital and Diabetes Center","place":["Mito, Ibaraki, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shinya","family":"Takahashi","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Kozawa Eye Hospital and Diabetes Center","place":["Mito, Ibaraki, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eri","family":"Ishikawa","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Kozawa Eye Hospital and Diabetes Center","place":["Mito, Ibaraki, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yasuhito","family":"Ikeda","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Kozawa Eye Hospital and Diabetes Center","place":["Mito, Ibaraki, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toru","family":"Kawanobe","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Kozawa Eye Hospital and Diabetes Center","place":["Mito, Ibaraki, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shingo","family":"Noda","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Kozawa Eye Hospital and Diabetes Center","place":["Mito, Ibaraki, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuichiro","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Kozawa Eye Hospital and Diabetes Center","place":["Mito, Ibaraki, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tadahiko","family":"Kozawa","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Kozawa Eye Hospital and Diabetes Center","place":["Mito, Ibaraki, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,3,26]]},"reference":[{"key":"B1","article-title":"Understanding and managing pterygium","volume":"29","author":"Hall","year":"2016","journal-title":"Community Eye Health"},{"key":"B2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1755-3768.1962.tb02388.x","article-title":"Pterygium and its relation to arcus senilis, pinguecula and other similar conditions","volume":"40","author":"Forsius","year":"1962","journal-title":"Acta Ophthalmol (Copenh)"},{"key":"B3","doi-asserted-by":"publisher","DOI":"10.1097\/ICO.0000000000002200","article-title":"Pterygium is related to short axial length","volume":"39","author":"Zhang","year":"2020","journal-title":"Cornea"},{"key":"B4","doi-asserted-by":"publisher","DOI":"10.1016\/S0161-6420(00)00219-0","article-title":"Effects of pterygium on corneal spherical power and astigmatism","volume":"107","author":"Tomidokoro","year":"2000","journal-title":"Ophthalmology"},{"key":"B5","article-title":"Effect of pterygium excision on pterygium induced astigmatism","volume":"51","author":"Maheshwari","year":"2003","journal-title":"Indian J Ophthalmol"},{"key":"B6","doi-asserted-by":"publisher","DOI":"10.1097\/MD.0000000000002232","article-title":"Predictability of intraocular lens power calculation after simultaneous pterygium excision and cataract surgery","volume":"94","author":"Kamiya","year":"2015","journal-title":"Med (Baltimore)"},{"key":"B7","doi-asserted-by":"publisher","DOI":"10.22336\/rjo.2021.31","article-title":"Comparison of intraocular lens power calculation in simultaneous and sequential pterygium and cataract surgery","volume":"65","author":"Joshi","year":"2021","journal-title":"Rom J Ophthalmol"},{"key":"B8","doi-asserted-by":"publisher","DOI":"10.2147\/OPTH.S303936","article-title":"Time to keratometric stability after pterygium excision and the associated factors: a clinical perspective","volume":"15","author":"Niruthisard","year":"2021","journal-title":"Clin Ophthalmol"},{"key":"B9","doi-asserted-by":"publisher","DOI":"10.1097\/ICO.0000000000000036","article-title":"Prediction of mean corneal power change after pterygium excision","volume":"33","author":"Kim","year":"2014","journal-title":"Cornea"},{"key":"B10","doi-asserted-by":"publisher","DOI":"10.1007\/s10384-019-00654-x","article-title":"Prediction of corneal curvature radius after pterygium surgery using anterior segment optical coherence tomography","volume":"63","author":"Takahashi","year":"2019","journal-title":"Jpn J Ophthalmol"},{"key":"B11","doi-asserted-by":"publisher","DOI":"10.1097\/j.jcrs.0000000000001739","article-title":"Intraocular lens power calculation adapted to sutureless scleral fixation with the Yamane technique","volume":"51","author":"De Vitto","year":"2025","journal-title":"J Cataract Refract Surg"},{"key":"B12","doi-asserted-by":"publisher","DOI":"10.3390\/jcm12082890","article-title":"A no-history multi-formula approach to improve the IOL power calculation after laser refractive surgery: preliminary results","volume":"12","author":"Cione","year":"2023","journal-title":"J Clin Med"},{"key":"B13","doi-asserted-by":"publisher","DOI":"10.3390\/jcm13175186","article-title":"Lens factor choice in IOL power calculation after laser refractive surgery: the right constant for advanced lens measurement approach (ALMA)","volume":"13","author":"Cione","year":"2024","journal-title":"J Clin Med"},{"key":"B14","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0288554","article-title":"Intraocular lens power calculation in eyes with a shallow anterior chamber depth and normal axial length","volume":"18","author":"Lee","year":"2023","journal-title":"PloS One"},{"key":"B15","doi-asserted-by":"publisher","DOI":"10.1097\/ICO.0b013e3181656448","article-title":"Analysis of pterygium size and induced corneal astigmatism","volume":"27","author":"Mohammad-Salih","year":"2008","journal-title":"Cornea"},{"key":"B16","doi-asserted-by":"publisher","first-page":"79","DOI":"10.4103\/sjopt.sjopt_211_21","article-title":"Incidence of refractive surprise after phacoemulsification in patients of cataract with primary pterygium","volume":"37","author":"Jain","year":"2023","journal-title":"Saudi J Ophthalmol"},{"key":"B17","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2016.09.015","article-title":"Pterygium size and effect on intraocular lens power calculation","volume":"42","author":"Koc","year":"2016","journal-title":"J Cataract Refract Surg"},{"key":"B18","doi-asserted-by":"publisher","first-page":"5017","DOI":"10.1038\/s41598-020-61959-3","article-title":"Influences of the three-dimensional parameters of pterygium on corneal astigmatism and the intraocular lens power calculation","volume":"10","author":"Tang","year":"2020","journal-title":"Sci Rep"}],"container-title":["Frontiers in Ophthalmology"],"original-title":[],"link":[{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fopht.2026.1759853\/full","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T05:28:08Z","timestamp":1774502888000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fopht.2026.1759853\/full"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,3,26]]},"references-count":18,"alternative-id":["10.3389\/fopht.2026.1759853"],"URL":"https:\/\/doi.org\/10.3389\/fopht.2026.1759853","relation":{},"ISSN":["2674-0826"],"issn-type":[{"value":"2674-0826","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,3,26]]},"article-number":"1759853"}}