Evaluation of Central Corneal Thickness Using Corneal Dynamic Scheimpflug Analyzer Corvis ST and Comparison with Pentacam Rotating Scheimpflug System and Ultrasound Pachymetry in Normal Eyes

Table 1

Intraobserver repeatability of the corneal dynamic Scheimpflug analyzer Corvis ST in measuring central corneal thickness ().

Operator	Mean (μm) ± SD	(μm)	TRT (μm)	CoV (%)	ICC (95% CI)
1st	535.9 ± 27.0	4.8	13.0	0.87	0.971; (0.958 to 0.980)
2nd	537.4 ± 27.6	4.7	13.0	0.87	0.972; (0.960 to 0.981)

SD = standard deviation, = within-subject standard deviation, TRT = test-retest repeatability (2.77), CoV = within-subject coefficient of variation, and ICC = intraclass correlation coefficient.