title: [Evaluating visual quality of an aspheric multifocal intraocular lens].
abstract: OBJECTIVE
  To evaluate visual quality of patients implanted with the AcrySof IQ ReSTOR multifocal aspheric intraocular lens.
  
  
  METHODS
  Retrospective study of patients who had implantation of an AcrySof IQ ReSTOR SN6AD3 IOL (Group test) or an AcrySof ReSTOR SN60D3 IOL (Group control). Group test comprised 30 patients (35 eyes) and Group control, 40 patients (56 eyes). Three months postoperatively, uncorrected and best corrected distance visual acuity, uncorrected and best corrected near visual acuity, best corrected intermediate visual acuity, the focus depth, higher order aberration, contrast sensitivity and glare sensitivity were measured in both IOL groups. Patients were orally administered a visual function questionnaire including questions about glare, halos, and other visual discomfort.
  
  
  RESULTS
  The percentage of patients with uncorrected near, far and intermediate visual acuity > or = 0.5 in test group was 80% (20/35), 82.9% (29/35) and 45.7% (16/35) respectively, and that of the control group was 76.8% (43/56), 80.4% (45/56) and 39.3% (22/56) respectively. There was no statistical difference of uncorrected visual acuity between two groups (P > 0.05). When compare the best distance corrected near, far and intermediate visual acuity between two groups, we can get the same results (P > 0.05). The contrast sensitivity and glare sensitivity in all frequency sect of group test have been more obviously improved postoperatively than that of group control (P < 0.05). The Z(4, 0), Z(4, 2), S3 + S4 and total S of Zernike coefficients was statistically different (P < 0.05). The other Zernike coefficients and higher order aberration did not differ significantly between the two groups (P > 0.05). There were no statistical difference between two groups in focus depth (P > 0.05). Both groups had no serious glare. Though three eyes felt discomfort of halos in group control, only one eye felt the same phenomenon in group test.
  
  
  CONCLUSIONS
  AcrySof IQ ReSTOR SN6AD3 intraocular lens has negative spherical aberration by an aspherical design in front surface, which makes it could counteract the positive spherical aberration of cornea. Consequently, IQ ReSTOR IOL gave good high-contrast visual acuity at distance, near and intermediate visual acuity.
authors.affiliation: Shandong Shierming Ophthalmology Hospital, Jinan 250002, China. b66hong66@yahoo.com.cn
authors.forename: Hong-Sheng
authors.initials: HS
authors.lastname: Bi
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Wu
authors.forename: Dong-Mei
authors.initials: DM
authors.lastname: Liu
authors.forename: Wan-Ting
authors.initials: WT
authors.lastname: Cai
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Xie
mesh_terms: D000368:Aged; D002386:Cataract / Q000628:therapy*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D014785:Vision, Ocular