AIM:To compare visual function and subjective patient satisfaction after phacoemulsification with implantation of AcrySof ReSTOR Aspheric multifocal intraocular lens(IOL) with a +3.0 diopter addition power or +4.0 diopter addition power.METHODS:After small-incision phacoemulsification,+3D IOL were implanted in 56 subjects(60 eyes,experimental group),+4D IOL were implanted in 58 subjects(60 eyes,control group).Three months following bilateral implantation,uncorrected distance visual acuity(UCDVA),uncorrected Intermediate visual acuity(UCIVA),uncorrected near visual acuity(UCNVA),best-corrected distance visual acuity(BCDVA),best-corrected near visual acuity(BCNVA),corneal astigmatism and contrast sensitivity were compared between two groups.A subjective outcome questionnaire was also completed by the subjects,including visual disturbances,patient satisfaction with their vision and spectacle independence.RESULTS:Three months after phacoemulsification,UCDVA and BCDVA,UCNVA and BCNVA in the +3D group were not statistically differences from +4D group(P>0.05).Intermediate visual acuity was statistically better in the +3D group(0.68±0.13)than that in the +4D group(0.55±0.08)(P<0.05).Corneal astigmatism after phacoemulsification can be significantly reduced,astigmatism was 0.75±0.13D preoperatively and 0.41±0.15D postoperatively in the group of single-incision,and in the group of bilateral-incision was 1.25±0.18D and 0.72±0.21D respectively.In both groups,there was significant difference between preoperative and postoperative(P<0.05).There was no significant difference in contrast sensitivity postoperatively(P>0.05).There was a low incidence in visual disturbances postoperatively,including problems with night vision,glare and halos in both groups(P>0.05).+3D group provided better intermediate visual acuity and more spectacle independence than +4D group.CONCLUSION:AcrySof ReSTOR Aspheric +3D IOLs may provide excellent overall quality of vision.Especially,intermediate vision in +3D was better than + 4D.Patients reported high rate of satisfaction and spectacle independence.So,we conclude that Acrysof ReSTOR Aspheric +3.0D IOL has excellent clinical effectiveness and value.