Table 2.

Corneal astigmatism values recorded preoperatively and at 1 and 3 months postoperatively.

	Autokeratometer (KR-1®)			Topography (ORBscan®)
	K Astig (mean, SD) range	P#	Δ† (mean, SD)	K Astig (mean, SD) range	P#	Δ† (mean, SD)
Preop	1.23, 0.52			1.17, 0.66
Postop 1 mo	0.85, 0.42	<0.001	−0.38, 0.51	0.96, 0.45	<0.001	−0.21, 0.67
Postop 3 mo	0.80, 0.45	<0.001	−0.44, 0.55	0.94, 0.50	<0.001	−0.23, 0.73

ΔChange of corneal astigmatism compared with preoperative data. #Wilcoxon's signed-rank test (comparison with baseline time point). †Algebraic method.