Comparison of central corneal thickness measurements by Galilei Dual-Scheimpflug analyzer® and ultrasound pachymeter in myopic eyes.
OBJECTIVE
To compare the central corneal thickness (CCT) measurements by Galilei Dual-Scheimpflug analyzer (GSA) (Ziemer Group, Port, Switzerland) and ultrasound pachymeter (UP) in myopic eyes.


METHODS
In this prospective study, CCT of 161 myopic eyes of 81 refractive surgery candidates (35 female, 46 male; mean age: 23.18 ± 4.08 years) were measured by GSA and UP consecutively. The data were analyzed statistically by paired t test, Bland-Altman plot, and Pearson correlation test to assess the agreement of the measurements.


RESULTS
The mean CCTs obtained by GSA and UP were 559.85 ± 30.87 and 560.41 ± 34.45 μm, respectively. No significant difference was found between the measurements (P = .684) and regression analysis showed a high correlation between the measurements obtained with both devices (r = 0.86; P < .001). A strong agreement between the two methods was also found by Bland-Altman plot.


CONCLUSIONS
In myopic eyes, the CCT measurements of GSA and UP are similar and highly correlated. Because of high agreement between these devices, the GSA is a non-contact method that may be an alternative to UP for measurement of CCT.
Department of Ophthalmology, Erzincan University Mengücek Gazi Education and Research Hospital, Erzincan, Turkey. dr.volkanyeter@gmail.com
Volkan
V
Yeter
Baris
B
Sönmez
Umit
U
Beden
D000293:Adolescent; D000328:Adult; D003315:Cornea / Q000000981:diagnostic imaging / Q000473:pathology*; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008297:Male; D009216:Myopia / Q000000981:diagnostic imaging / Q000473:pathology*; D010781:Photography / Q000379:methods; D011446:Prospective Studies; D012044:Regression Analysis; D014463:Ultrasonography / Q000295:instrumentation; D055815:Young Adult