Comparison of keratometric values and anterior segment parameters measured using Scheimpflug Sirius topography and Lenstar biometry

• Published in: International ophthalmology 2024-02, Vol.44 (1), p.103-103, Article 103
• Main Authors: Telek, Hande Hüsniye, Bilen, Rabia Büşra Akden, Özdemir, Yaprak Arzu, Dinç, Damla Nur, Çelikay, Osman
• Format: Article
• Language: English
• Subjects: Anterior chamber; Astigmatism; Cataracts; Comorbidity; Cornea; Eye surgery; Intraocular lenses; Medicine; Medicine & Public Health; Ophthalmology; Original Paper; Parameters; Patients; Power measurement; Segments; Surgery; Topography
• ISSN: 1573-2630; 0165-5701; 1573-2630
• DOI: 10.1007/s10792-024-03046-4

Purpose This study aimed to evaluate the consistency of preoperative keratometric values, anterior segment, and intraocular lens (IOL) power measurements in patients with cataract and no comorbidities using the Sirius topography device (CSO, Italy) and Lenstar LS 900 (Haag–Streit AG, Köeniz, Switzerland). Methods Patients with grade 2 and 3 cataracts who applied to Ophthalmology Clinic of Dışkapı Yıldırım Beyazıt Education and Research Hospital, University of Health Sciences and planned for cataract surgery were included the study. Forty eyes with cataract from 40 patients were taken in the study. All patients underwent preoperative assessment using a combined Scheimpflug–Placido disc-based tomography device (Sirius) and Lenstar before cataract surgery. Keratometric measurements, such as flat keratometry (K1), steep keratometry (K2), and maximum keratometry (Kmax), and anterior segment parameters, white-to-white (WTW) distance, IOL power, astigmatism (AST), anterior chamber depth (ACD), aqueous depth (AD), and central cornea thickness (CCT), were recorded. Results There were significant differences between K1 Lenstar and K1 Sirius , K2 Lenstar and K2 Sirius , Kmax Lenstar and Kmax Sirius , WTW Lenstar and WTW Sirius , and IOL power Lenstar versus IOL power Sirius . However, there were insignificant differences between AST Lenstar and AST Sirius , ACD Lenstar versus ACD Sirius , AD Lenstar and AD Sirius , and CCT Lenstar and CCT Sirius variables. Furthermore, it was found that Sirius measured significantly higher than Lenstar, especially in terms of IOL power. Conclusion Significant differences were observed between Lenstar and Sirius in terms of keratometric values, WTW distance, and IOL power. The IOL power value measured with Sirius was found to be higher than the IOL power value measured with Lenstar.