Total keratometry for determination of true corneal power after myopic small-incision lenticule extraction

Lischke, Roman; Mayer, Wolfgang J.; Feucht, Nikolaus; Siedlecki, Jakob; Wiltfang, Rainer; Kook, Daniel; Priglinger, Siegfried G. und Luft, Nikolaus (2021): Total keratometry for determination of true corneal power after myopic small-incision lenticule extraction. In: Journal of Cataract and Refractive Surgery, Bd. 47, Nr. 10: S. 1285-1289

Abstract

Purpose: To gauge the value of total keratometry (TK) to estimate corneal power change in eyes that underwent small-incision lenticule extraction (SMILE) for treatment of myopia or myopic astigmatism. Setting: Department of Ophthalmology, Ludwig-Maximilians-University, and SMILE Eyes Clinic Munich Airport, Munich, Germany. Design: Prospective cross-sectional trial. Methods: A total of 40 eyes of 40 patients who had undergone myopic SMILE were enrolled in this prospective study. Total corneal refractive power (TCRP;Pentacam HR) and TK (IOLMaster 700, Carl Zeiss Meditec AG) values were compared with the clinical history method (CHM). The surgically induced changes in TCRP (Delta TCRP) and TK (Delta TK) were also compared with the changes in spherical equivalent on the corneal plane (Delta SEco). Results: Of the 40 eyes analyzed, the correlation between TK and CHM (R-2 = 0.91, P < .001) was stronger than that between TCRP and CHM (R-2 = 0.87, P < .001). When compared with the CHM, TCRP underestimated corneal power by a mean relative error of 0.59 diopter (D) and TK by 0.17 D. Linear regression analysis of Delta TCRP/Delta TK and the difference between preoperative and postoperative manifest refraction spherical equivalent at the corneal plane (Delta SEco) showed stronger correlation in Delta TK (R-2 = 0.88) than that in Delta TCRP (R-2 = 0.82). Conclusions: The findings endorse TK as an accurate measure for corneal power after myopic SMILE. Copyright (C) 2021 Published by Wolters Kluwer on behalf of ASCRS and ESCRS

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 0886-3350
• Sprache: Englisch