Precision of Corneal Thickness Measurements Obtained Using the Scheimpflug-Placido Imaging and Agreement with Ultrasound Pachymetry

Table 3

Comparison of central corneal thickness (CCT) and the thinnest corneal thickness (TCT) readings by the Scheimpflug-Placido topographic modeling system (TMS-5) and ultrasound pachymetry.

Parameters	Mean difference ± SD	value	Lower 95% LoA (95% CI)	Upper 95% LoA (95% CI)
CCT (μm)	−15.97 ± 5.33	<0.001	−26.42 (−28.53 to −24.33)	−5.52 (−7.63 to −3.42)
TCT (μm)	−20.32 ± 5.28	<0.001	−30.67 (−32.75 to −28.58)	−9.97 (−12.06 to −7.89)

SD: standard deviation; LoA: limits of agreement; CI: confidence interval.