There was no significant difference in SIA between the groups ( femtosecond laser group : 0.47 0.13 vs manual group : 0.41 0.14 ; P = .218 ) , but the axis deviation of the SIA axis from the previously planned axis was significantly smaller in the femtosecond laser group compared to the manual group ( 4.47 2.59 vs 7.38 4.72 , respectively ; P = .048 ) .