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 2

Interobserver reproducibility of central corneal thickness readings using average (from average of 3 consecutive readings from each observer) and single (from the first reading from each observer) measurement by the corneal dynamic Scheimpflug analyzer Corvis ST.

Parameter	Mean (μm) ± SD	(μm)	TRT (μm)	CoV (%)	ICC (95% CI)
Average	536.6 ± 27.2	3.5	9.7	0.65	0.984; (0.973 to 0.990)
Single	536.4 ± 27.5	4.5	12.6	0.85	0.973; (0.958 to 0.982)

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