Eyes undergoing both treatments had improved best-corrected visual acuity ( WFG : mean , @ -LSB- @ % CI , @-@ @ -RSB- ; WFO : mean , @ -LSB- @ % CI , @-@ @ -RSB- ) and less sphere ( WFG : mean , -@ -LSB- @ % CI , -@ to -@ -RSB- ; WFO : mean , -@ -LSB- @ % CI , -@ to -@ -RSB- ) , cylinder ( WFG : mean , @ -LSB- @ % CI , @-@ @ -RSB- ; WFO : mean , @ -LSB- @ % CI , @-@ @ -RSB- ) , and spherical equivalents ( WFG : mean , -@ -LSB- @ % CI , -@ to -@ -RSB- ; WFO : mean , -@ -LSB- @ % CI , -@ to -@ -RSB- ) ( P < @ ) but higher levels of spherical aberration ( WFG : mean , -@ -LSB- @ % CI , -@ to -@ -RSB- ; WFO : mean , -@ -LSB- @ % CI , -@ to -@ -RSB- ) ( P < @ ) and higher-order root-mean-square aberrations ( WFO : mean , -@ -LSB- @ % CI , -@ to -@ -RSB- ; WFO : mean , -@ -LSB- @ % CI , -@ to -@ -RSB- ) ( P = @ in WFG eyes and P < @ in WFO eyes ) at @ months compared with preoperative measurements .