Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers

Table 3

Mean difference between anterior corneal keratometry values for each pair of devices.

	iTrace-IOLMaster	iTrace-Pentacam	IOLMaster-Pentacam
Astigmatism magnitude (D)	−0.10 ± 0.33	0.03 ± 0.27	0.12 ± 0.38
	= 0.005	= 0.325	= 0.002
Flat keratometry (D)	−0.35 ± 0.27	−0.31 ± 0.33	0.04 ± 0.36
	< 0.001	< 0.001	= 0.310
Steep keratometry (D)	−0.45 ± 0.26	−0.29 ± 0.30	0.16 ± 0.24
	< 0.001	< 0.001	< 0.001
Mean keratometry (D)	−0.40 ± 0.20	−0.30 ± 0.29	0.10 ± 0.24
	< 0.001	< 0.001	< 0.001

D: diopter.