Table 2. Vector analysis outcome using Alpins methods.

Parameters	Mean	SD	Range
TIA	1.23	0.38	0.76, 2.9
SIA	0.77	0.45	0.11, 2.09
DV	0.77	0.39	0, 1.10
AE	8.52	18.09	-23.62, 67.65
CI	0.54a	0.28	0.07, 1.71
IOS	0.66	0.34	0, 1.56

TIA: Target induced astigmatism; SIA: Surgically induced astigmatism; DV: Difference vector; AE: Angle of Errior; CI: Correction index; IOS: Index of Success; SD: Standrad deviation. ^aGeometric mean.