Comparison of Keratometric Data Obtained by Automated Keratometer, Dicon CT 200, Allegro Topolyzer, and Pentacam
Küçük Resim Yok
Tarih
2012
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Slack Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
PURPOSE: To compare the keratometric values measured by the automated keratometer, two Placido-based computerized topography systems (Dicon CT 200 [Vismed Inc] and Allegro Topolyzer [WaveLight Inc]), and Scheimpflug analysis (Pentacam [Oculus Optikgerate GmbH]). METHODS: The keratometric data of 200 eyes from 200 patients evaluated for refractive surgery were reviewed retrospectively. Mean simulated keratometry (Sim K) and mean corneal astigmatism measured by the four devices were compared using repeated measures analysis of variance with Bonferroni correction. The analysis of agreement between two measurements was assessed using the method of Bland and Altman. RESULTS: Mean Sim K as measured by the automated keratometer, Dicon CT 200, Allegro Topolyzer, and Pentacam was 43.39 +/- 1.50 diopters (D), 43.55 +/- 1.50 D, 43.45 +/- 1.50 D, and 43.43 +/- 1.45 D, respectively. The Dicon CT 200 measured the mean Sim K to be steeper and the automated keratometer measured the mean Sim K to be flatter than the other devices. Significant differences in corneal astigmatism were noted among the four devices except Dicon CT 200 versus Allegro Topolyzer and Allegro Topolyzer versus Pentacam comparisons (P <.013). For mean Sim K, the 95% limits of agreement between the Pentacam and other three devices were significantly wider than the other comparisons. In Bland-Altman plots comparing the Pentacam to the other devices, extreme outliers were present in 11 (5.5%) eyes. CONCLUSIONS: Because of the wide distribution range and presence of extreme outliers, Pentacam data should be used cautiously in IOL power calculation and astigmatic keratotomy procedures. [J Refract Surg. 2012;28(8):557-561.] doi:10.3928/1081597X-20120723-04
Açıklama
28th Congress of the European-Society-of-Cataract-and-Refractive-Surgeons -- SEP 04-08, 2010 -- Paris, FRANCE
Anahtar Kelimeler
Corneal, Videokeratography, Reproducibility, Repeatability, Topography, Agreement, Accuracy, Systems
Kaynak
Journal of Refractive Surgery
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
28
Sayı
8
