{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T20:26:52Z","timestamp":1787776012862,"version":"build-2784847793"},"reference-count":14,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"1","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2017,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>To compare refractive index variation between Hoffer-Q, Haigis and SRK\/T formulas used for preoperative biometry calculation in patients with axial length &gt;25 mm, undergoing cataract surgery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods:<\/jats:title>\n                    <jats:p>This is a randomized clinical trial study was performed on 54 eyes of 54 patients with ages of 40\u201370 years old and axial length &gt;25 mm classified into three groups that their IOL POWER were calculated by Haigis, SRK\/T and Hoffer-Q formulas before undergoing cataract surgery. Their refractive index variations were calculated from the difference between predicted refractive error formula and actual post-operative refractive error formula. The collected data was entered in SPSS software and was analyzed by ANOVA and Chi-square statistical test.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>With comparison sphere, astigmatism and spherical equivalent indexes before and after of cataract surgery between Haigis, SRK\/T, and Hoffer-Q formulas, statistically significant differences were found between the mean of sphere and SE indexes in patients with use of Haigis and SRK\/T formulas that have been more favorable post-operative refraction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Haigis formula and then, with slight difference, SRK\/T formula have better and more acceptable post-operative refraction results than Hoffer-Q formula in patients with high axial myopia. Therefore, it is recommended using Haigis and SRK\/T formulas for IOL power calculation in patients with high axial myopia undergoing cataract surgery.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.4103\/2277-9175.210657","type":"journal-article","created":{"date-parts":[[2023,10,27]],"date-time":"2023-10-27T02:14:35Z","timestamp":1698372875000},"update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":7,"title":["The Comparative Study of Refractive Index Variations between Haigis, Srk\/T and Hoffer-Q Formulas Used for Preoperative Biometry Calculation in Patients with the Axial Length &gt;25 mm"],"prefix":"10.4103","volume":"6","author":[{"given":"Hasan","family":"Razmjoo","sequence":"first","affiliation":[{"name":"From the Department of Ophthalmology, Isfahan University of Medical sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hosein","family":"Atarzadeh","sequence":"additional","affiliation":[{"name":"From the Department of Ophthalmology, Isfahan University of Medical sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Neda","family":"Kargar","sequence":"additional","affiliation":[{"name":"From the Department of Ophthalmology, Isfahan University of Medical sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad","family":"Behfarnia","sequence":"additional","affiliation":[{"name":"From the Department of Ophthalmology, Isfahan University of Medical sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kobra","family":"Nasrollahi","sequence":"additional","affiliation":[{"name":"From the Department of Ophthalmology, Isfahan University of Medical sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ali","family":"Kamali","sequence":"additional","affiliation":[{"name":"From the Department of Ophthalmology, Isfahan University of Medical sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2017,7,14]]},"reference":[{"key":"R1-20250806","first-page":"309","article-title":"Prevalence of cataract in people above 40 years old resident in Tehran","volume":"9","author":"Javadi","year":"2004","journal-title":"Bina J Ophthalmol"},{"key":"R4-20250806","doi-asserted-by":"crossref","first-page":"960","DOI":"10.1136\/bjo.87.8.960","article-title":"IOL master biometry: Refractive results of 100 consecutive cases","volume":"87","author":"Eleftheriadis","year":"2003","journal-title":"Br J Ophthalmol"},{"key":"R5-20250806","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1016\/j.sjopt.2010.03.006","article-title":"Intra-ocular lens power 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Med"},{"key":"R13-20250806","doi-asserted-by":"crossref","first-page":"1575","DOI":"10.1016\/j.jcrs.2009.04.028","article-title":"Intraocular lens power calculation and optimized constants for highly myopic eyes","volume":"35","author":"Petermeier","year":"2009","journal-title":"J Cataract Refract Surg"},{"key":"R14-20250806","doi-asserted-by":"crossref","first-page":"1321","DOI":"10.1007\/s00417-012-2013-9","article-title":"Comparison of intraocular lens power prediction using immersion ultrasound and optical biometry with and without formula optimization","volume":"250","author":"Nemeth","year":"2012","journal-title":"Graefes Arch Clin Exp Ophthalmol"},{"key":"R15-20250806","doi-asserted-by":"crossref","first-page":"126","DOI":"10.4103\/0974-620X.71888","article-title":"Accuracy of intraocular lens power calculation in high myopia","volume":"3","author":"Ghanem","year":"2010","journal-title":"Oman J Ophthalmol"},{"key":"R16-20250806","first-page":"150","article-title":"Optical biometry intraocular lens power calculation using different formulas in patients with different axial lengths","volume":"6","author":"Wang","year":"2013","journal-title":"Int J Ophthalmol"},{"key":"R17-20250806","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1016\/j.jcrs.2007.10.017","article-title":"Intraocular lens power calculation using the IOLMaster and various formulas in eyes with long axial length","volume":"34","author":"Wang","year":"2008","journal-title":"J Cataract Refract Surge"}],"container-title":["Advanced Biomedical 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