Comparison of Anterior Segment Measurements With a Dual Scheimpflug Placido Corneal Topographer and a New Partial Coherence Interferometer in Keratoconic Eyes

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dc.contributor.authorYagci, Ramazan
dc.contributor.authorKulak, Ali Ender
dc.contributor.authorGuler, Emre
dc.contributor.authorTenlik, Aylin
dc.contributor.authorGuragac, Fatma Betul
dc.contributor.authorHepsen, Ibrahim Feyzi
dc.date.accessioned2025-10-24T18:09:17Z
dc.date.available2025-10-24T18:09:17Z
dc.date.issued2015
dc.departmentMalatya Turgut Özal Üniversitesi
dc.description.abstractPurpose:To evaluate the repeatability and agreement of the anterior segment measurements obtained using the Galilei dual Scheimpflug analyzer (Galilei DSA; Ziemer) and Nidek AL Scan (Nidek CO, Aichi, Japan) biometry in keratoconic and normal eyes.Methods:Three consecutive measurements were performed by the same examiner using both devices in 62 healthy and 88 keratoconic eyes. Central corneal thickness (CCT), anterior chamber depth, keratometry readings (K) [in flattest meridian (Kf), in steepest meridian (Ks), and mean (Km)], and white-to-white distance were evaluated. Repeatability was assessed by calculating the within-subject SD and coefficient of variation. The agreement between both devices was assessed using the Bland-Altman method.Results:Both devices achieved excellent repeatability for all parameters in each group. The 95% limits of agreement (LoA) between both devices were also very narrow and acceptable for all parameters in normal corneas. However, the 95% LoA for agreement was large for CCT and measurements related to K (Kf, Ks, and Km) using both 2.4 and 3.3 mm in keratoconic eyes. In addition, compared with the Galilei DSA, K values of the Nidek AL Scan using a diameter of 3.3 mm showed slightly closer 95% LoA than those obtained using a diameter of 2.4 mm.Conclusions:In normal eyes, the Galilei DSA and Nidek AL Scan can be used interchangeably for anterior segment measurements. In keratoconic eyes, both devices yielded interchangeable anterior chamber depth and white-to-white distance measurements, whereas CCT and keratometry measurements showed clinically significant differences.
dc.identifier.doi10.1097/ICO.0000000000000480
dc.identifier.endpage1018
dc.identifier.issn0277-3740
dc.identifier.issn1536-4798
dc.identifier.issue9
dc.identifier.pmid26203742
dc.identifier.scopus2-s2.0-84939779462
dc.identifier.scopusqualityQ1
dc.identifier.startpage1012
dc.identifier.urihttps://doi.org/10.1097/ICO.0000000000000480
dc.identifier.urihttps://hdl.handle.net/20.500.12899/3568
dc.identifier.volume34
dc.identifier.wosWOS:000360348600004
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherLippincott Williams & Wilkins
dc.relation.ispartofCornea
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20251023
dc.subjectGalilei DSA; Nidek AL Scan; keratoconus; agreement; repeatability
dc.titleComparison of Anterior Segment Measurements With a Dual Scheimpflug Placido Corneal Topographer and a New Partial Coherence Interferometer in Keratoconic Eyes
dc.typeArticle

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