Corneal HOAs increased significantly in both groups ( femtosecond laser group : 0.13 0.09 to 0.18 0.12 , P = .025 ; manual group : 0.13 0.05 to 0.15 0.05 , P = .002 ) , but preoperative and postoperative values did not differ significantly between them ( P = .472 and .078 , respectively ) .