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

Table 4

Intraocular lens power and toricity calculated using the online Barrett toric calculator for each device.

	iTrace n = 101	IOLMaster n = 101	Pentacam n = 101
IOL power (D)	20.8 ± 2.8	20.3 ± 2.9	20.4 ± 2.8
	Range: 12.5–27.0	Range: 12.5–27.0	Range: 12.5–27.0
Toricity (T)	5 ± 2	5 ± 2	5 ± 2
	Range: 2–9	Range: 2–9	Range: 2–9
Axis (degree)	62 ± 66	59 ± 64	64 ± 65
	Range: 1–180	Range: 0–179	Range: 1–179

D: diopter.