{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T13:50:26Z","timestamp":1791985826451,"version":"4.4.0"},"reference-count":26,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2022,11,24]],"date-time":"2022-11-24T00:00:00Z","timestamp":1669248000000},"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>Background: Posterior keratometry measurements are evolving features of the optical biometers. The differences between devices have bigger impact for the low astigmatism values. The majority of adults present the corneal astigmatism below 1.5 D. Objectives: To compare the total corneal astigmatism measured with two different technologies in cataract patients with corneal astigmatism below 1.5 D. Material and Methods: Three automated exams were performed on each of the two devices: swept-source optical coherence tomography (SS-OCT) and Scheimpflug biometers. The anterior and total corneal astigmatism and power were analysed. Statistical comparisons were performed for within-subject standard deviation, repeatability, Bland\u2013Altman and vector analysis. Results: Twenty-nine eyes of twenty-seven patients were included. The limits of agreement between anterior and total corneal astigmatism were narrower for the SS-OCT than for the Scheimpflug biometer (\u22120.16 to 0.29 D and \u22120.40 to 0.39 D, respectively). The &gt;0.5 D difference between SS-OCT and Scheimpflug total astigmatism was noticed in 5 (17%) of cases. The difference between mean total keratometric power for both devices was statistically significant (0.2 D, p &lt; 0.001). SS-OCT total corneal flat measurements had worse repeatability than Scheimpflug (p = 0.007). Conclusions: For the corneal astigmatism &lt;1.5 D, the difference between anterior and total corneal astigmatism measured with SS-OCT was clinically not significant. The mean anterior and total keratometry values obtained with Scheimpflug and SS-OCT biometers are not interchangeable.<\/jats:p>","DOI":"10.3390\/jcm11236921","type":"journal-article","created":{"date-parts":[[2022,11,24]],"date-time":"2022-11-24T03:24:09Z","timestamp":1669260249000},"page":"6921","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Measurements of Anterior and Posterior Corneal Curvatures with OCT and Scheimpflug Biometers in Patients with Low Total Corneal Astigmatism"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4666-2400","authenticated-orcid":false,"given":"Maria","family":"Muzyka-Wo\u017aniak","sequence":"first","affiliation":[{"name":"Ophthalmology Clinical Center SPEKTRUM, Zaolzianska Str. 4, 53-334 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9490-3352","authenticated-orcid":false,"given":"Adam","family":"Oleszko","sequence":"additional","affiliation":[{"name":"Ophthalmology Clinical Center SPEKTRUM, Zaolzianska Str. 4, 53-334 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3724-2391","authenticated-orcid":false,"given":"Andrzej","family":"Grzybowski","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, University of Warmia and Mazury, Zo\u0142nierska Str. 18, 10-561 Olsztyn, Poland"},{"name":"Institute for Research in Ophthalmology, Foundation for Ophthalmology Development, Mickiewicza 24, 61-836 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,11,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1645","DOI":"10.1016\/j.jcrs.2014.01.046","article-title":"Influence of posterior corneal astigmatism on total corneal astigmatism in eyes with moderate to high astigmatism","volume":"40","author":"Savini","year":"2014","journal-title":"J. Cataract. Refract. Surg."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2141","DOI":"10.2147\/OPTH.S120414","article-title":"Clinical outcomes with toric intraocular lenses planned using an optical low coherence reflectometry ocular biometer with a new toric calculator","volume":"10","author":"Gundersen","year":"2016","journal-title":"Clin. Ophthalmol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"794","DOI":"10.3928\/1081597X-20171004-03","article-title":"Comparison of Methodologies Using Estimated or Measured Values of Total Corneal Astigmatism for Toric Intraocular Lens Power Calculation","volume":"33","author":"Ferreira","year":"2017","journal-title":"J. Refract. Surg."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1016\/j.jcrs.2015.11.036","article-title":"Effect of posterior corneal astigmatism on power calculation and alignment of toric intraocular lenses: Comparison of methodologies","volume":"42","author":"Reitblat","year":"2016","journal-title":"J. Cataract. Refract. Surg."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"675","DOI":"10.1097\/j.jcrs.0000000000000136","article-title":"Evaluation of total corneal power measurements with a new optical biometer","volume":"46","author":"Shajari","year":"2020","journal-title":"J. Cataract. Refract. Surg."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"59","DOI":"10.2174\/1874364102014010059","article-title":"Comparison of Standard and Total Keratometry Astigmatism Measured with three Different Technologies","volume":"14","author":"Carreras","year":"2020","journal-title":"Open Ophthalmol. J."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1637","DOI":"10.1097\/j.jcrs.0000000000000346","article-title":"Repeatability and comparability of keratometry measurements obtained with swept-source optical coherence and combined dual Scheimpflug-Placido disk-based tomography","volume":"46","author":"Lu","year":"2020","journal-title":"J. Cataract. Refract. Surg."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"307","DOI":"10.1038\/s41433-020-01245-8","article-title":"Repeatability of total Keratometry and standard Keratometry by the IOLMaster 700 and comparison to total corneal astigmatism by Scheimpflug imaging","volume":"35","author":"Savini","year":"2021","journal-title":"Eye"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"P\u00e9rez-Bartolom\u00e9, F., Rocha-De-Lossada, C., S\u00e1nchez-Gonz\u00e1lez, J.M., Feu-Basilio, S., Torras-Sanvicens, J., and Peraza-Nieves, J. (2021). Anterior-Segment Swept-Source Ocular Coherence Tomography and Scheimpflug Imaging Agreement for Keratometry and Pupil Measurements in Healthy Eyes. J. Clin. Med., 10.","DOI":"10.3390\/jcm10245789"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1516395","DOI":"10.1155\/2017\/1516395","article-title":"Comparison of Repeatability and Agreement between Swept-Source Optical Biometry and Dual-Scheimpflug Topography","volume":"2017","author":"Jung","year":"2017","journal-title":"J. Ophthalmol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"488","DOI":"10.1097\/j.jcrs.0000000000000483","article-title":"Agreement between 2 swept-source OCT biometers and a Scheimpflug partial coherence interferometer","volume":"47","year":"2021","journal-title":"J. Cataract. Refract. Surg."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"318","DOI":"10.1016\/j.clae.2017.03.007","article-title":"Repeatability and agreement of Scheimpflug-based and swept-source optical biometry measurements","volume":"40","author":"Sel","year":"2017","journal-title":"Contact Lens Anterior Eye"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"3991","DOI":"10.2147\/OPTH.S280868","article-title":"Repeatability of OCT-based versus scheimpflug-and reflection-based keratometry in patients with hyperosmolar and normal tear film","volume":"14","author":"Gjerdrum","year":"2020","journal-title":"Clin. Ophthalmol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"298","DOI":"10.1016\/j.jcrs.2018.10.033","article-title":"Comparison of anterior segment measurements obtained using a swept-source optical coherence tomography biometer and a Scheimpflug-Placido tomographer","volume":"45","author":"Lu","year":"2019","journal-title":"J. Cataract. Refract. Surg."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1016\/j.ajo.2016.06.020","article-title":"Agreement between Swept-Source Optical Biometry and Scheimpflug-based Topography Measurements of Anterior Segment Parameters","volume":"169","year":"2016","journal-title":"Am. J. Ophthalmol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"25158414211063283","DOI":"10.1177\/25158414211063283","article-title":"Agreement in anterior segment measurements between swept-source and Scheimpflug-based optical biometries in keratoconic eyes: A pilot study","volume":"14","author":"Chalkiadaki","year":"2022","journal-title":"Ther. Adv. Ophthalmol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1652","DOI":"10.1097\/j.jcrs.0000000000000327","article-title":"Posterior and total corneal astigmatism measured with optical coherence tomography\u2013based biometer and dual Scheimpflug analyzer","volume":"46","author":"Wang","year":"2020","journal-title":"J. Cataract. Refract. Surg."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Pontikos, N., Chua, S., Foster, P.J., Tuft, S.J., and Day, A.C. (2019). UK Biobank Eye and Vision Consortium (2019) Frequency and distribution of corneal astigmatism and keratometry features in adult life: Methodology and findings of the UK Biobank study. PLoS ONE, 14.","DOI":"10.1101\/654236"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"367","DOI":"10.1097\/00006324-199706000-00019","article-title":"Power vectors: An application of Fourier analysis to the description and statistical analysis of refractive error","volume":"74","author":"Thibos","year":"1997","journal-title":"Optom. Vis. Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"330","DOI":"10.1111\/j.1475-1313.2011.00851.x","article-title":"Statistical methods for conducting agreement (comparison of clinical tests) and precision (repeatability or reproducibility) studies in optometry and ophthalmology","volume":"31","author":"McAlinden","year":"2011","journal-title":"Ophthalmic Physiol. Opt."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1169","DOI":"10.1016\/j.jcrs.2018.07.027","article-title":"Editorial. Pursuing Perfection in IOL Calculations IV: Astigmatism analysis, SIA and double angle plots","volume":"44","author":"Abulafia","year":"2018","journal-title":"J. Cataract. Refract. Surg."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"744","DOI":"10.1136\/bmj.313.7059.744","article-title":"Mesurement error","volume":"313","author":"Bland","year":"1996","journal-title":"BMJ"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"231","DOI":"10.1593\/tlo.09268","article-title":"Applications of the repeatability of quantitative imaging biomarkers: A review of statistical analysis of repeat data sets","volume":"2","author":"Barnhart","year":"2009","journal-title":"Transl. Oncol."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"e71","DOI":"10.1097\/OPX.0000000000000513","article-title":"Exact parametric confidence intervals for Bland-Altman limits of agreement","volume":"92","author":"Carkeet","year":"2015","journal-title":"Optom. Vis. Sci."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"2080","DOI":"10.1016\/j.jcrs.2012.08.036","article-title":"Contribution of posterior corneal astigmatism to total corneal astigmatism","volume":"38","author":"Koch","year":"2012","journal-title":"J. Cataract. Refract. Surg."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"749","DOI":"10.1111\/ceo.13760","article-title":"Total keratometry in intraocular lens power calculations in eyes with previous laser refractive surgery","volume":"48","author":"Lawless","year":"2020","journal-title":"Clin. Exp. Ophthalmol."}],"container-title":["Journal of Clinical Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2077-0383\/11\/23\/6921\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:25:35Z","timestamp":1760145935000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2077-0383\/11\/23\/6921"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,11,24]]},"references-count":26,"journal-issue":{"issue":"23","published-online":{"date-parts":[[2022,12]]}},"alternative-id":["jcm11236921"],"URL":"https:\/\/doi.org\/10.3390\/jcm11236921","relation":{},"ISSN":["2077-0383"],"issn-type":[{"value":"2077-0383","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,11,24]]}}}