Table 2.

Change in sphere, cylinder and spherocylindrical equivalent pre-operatively to post-operatively

Group/parameter	Pre-operative	Post-operative	p value
	Mean (D) ± SD	Mean (D) ± SD
Study
Sphere	1.41 ± 1.59	0.23 ± 0.42	<0.0001
Cylinder	−0.45 ± 0.38	−0.41 ± 0.39	0.24
SE	+1.18 ± 1.68	0.03 ± 0.40	<0.0001
Control
Sphere	0.31 ± 3.12	0.29 ± 0.25	0.65
Cylinder	−0.67 ± 0.32	−0.63 ± 0.42	0.91
SE	−0.02 ± 3.06	0.07 ± 0.16	0.81

SE spherical equivalent