Comparison of Corneal Higher-Order Aberrations Measured with Two Instruments Using Scheimpflug Camera System.
10.3341/jkos.2015.56.10.1497
- Author:
Yeon Jung CHOI
1
;
Na Hee KANG
;
Roo Min JUN
Author Information
1. Department of Ophthalmology, Ewha Womans University School of Medicine, Seoul, Korea. jrmoph@ewha.ac.kr
- Publication Type:Original Article
- Keywords:
Corneal higher-order aberrations;
Galilei(TM) G4;
Pentacam(R)
- MeSH:
Astigmatism;
Lotus
- From:Journal of the Korean Ophthalmological Society
2015;56(10):1497-1504
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To compare the corneal higher-order aberrations (HOAs) of normal young subjects using Galilei(TM) G4 (Zeimer, Port, Switzerland) and Pentacam(R) (Oculus Inc., Wetzlar, Germany). METHODS: Corneal HOAs were measured using Galilei(TM) G4 and Pentacam(R) in 41 healthy individuals (41 eyes). Intraclass correlation coefficients (ICCs) were obtained to evaluate the repeatability of the 2 devices. Differences in HOAs between the 2 instruments were analyzed with a paired t-test and correlations evaluated. RESULTS: All ICCs measured using Galilei(TM) G4 and Pentacam(R) showed more than moderate repeatability (>0.81) except trefoil, tetrafoil, 4th and 5th HOAs. When comparing the measurements obtained with Galilei(TM) G4 and Pentacam(R), total HOAs, spherical aberration (SA), secondary astigmatism and 5th total HOAs were statistically significantly different between the 2 device (all p < or = 0.001). In addition, Galilei(TM) G4 and Pentacam(R) showed discrepancy among all corneal HOAs items. Although the total corneal HOAs and the SA were significantly correlated, other HOA measurements generally exhibited a low correlation. CONCLUSIONS: Corneal HOAs obtained by the 2 instruments cannot be used interchangeably due to their differences and discrepancy although corneal HOAs measured using Galilei(TM) G4 and Pentacam(R) showed relatively high repeatability.
