Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy Corneas

Table 5

Interdevice differences of the two devices in corneas with regular astigmatism.

	Pentacam	Sirius	values
	Mean ± SD
Pachymetry (µm)
Apex	560.45 ± 36.41	590.66 ± 55.62	<0.0001
Thinnest point	554.84 ± 35.50	545.88 ± 33.45	<0.0001
Keratometry ant. surface (mm)
3 mm flat meridian	7.982 ± 0.374	8.007 ± 0.378	0.654
3 mm steep meridian	7.685 ± 0.344	7.631 ± 0.396	0.002
5 mm flat meridian	8.023 ± 0.372	7.996 ± 0.369	0.343
5 mm steep meridian	7.752 ± 0.359	7.663 ± 0.385	0.002
7 mm flat meridian	8.187 ± 0.430	8.042 ± 0.429	<0.0001
7 mm steep meridian	7.914 ± 0.387	7.750 ± 0.387	<0.0001
Keratometry back surface (mm)
3 mm flat meridian	6.719 ± 0.377	6.838 ± 0.419	0.001
3 mm steep meridian	6.347 ± 0.363	6.317 ± 0.536	0.587