title: Comparison on visual function after implantation of an apodized diffractive aspheric multifocal or monofocal intraocular lens.
abstract: OBJECTIVE
  To evaluate visual outcomes after implantation of an aspheric multifocal/ intraocular lens (MIOL) or an aspheric monofocal intraocular lens (IOL).
  
  
  METHODS
  This was a prospective nonrandomized study. During 3-months of post-operative follow-up, the following outcomes for SN6AD1 MIOL (multifocal group) and SN60WF IOL (monofocal group) were compared: uncorrected (UDVA) and corrected (CDVA) distance visual acuity, uncorrected (UNVA) and distance-corrected (DCNVA) near visual acuity, Chinese character near visual acuity, uncorrected intermediate visual acuity (UIVA) under high (100% contrast) and low contrast (10% contrast), UIVA for different IOL powers, and a quality-of-life questionnaire.
  
  
  RESULTS
  UNVA, DCNVA, and UIVA under high contrast in the multifocal group were significantly better than those in the monofocal group (P<0.05). UDVA, CDVA and UIVA under low contrast did not differ between groups at 63 cm and 100 cm (P>0.05). In most of the cases, Chinese character near visual acuity was significantly better in the multifocal group (P<0.05). UNVA and UIVA at 63cm were improved 3 months post-operatively. Better UIVA was found in emmetropic and mild myopic eyes as compared to hyperopic ones. The patients in the multifocal group had a higher degree of satisfaction and performed better on near and intermediate tasks, although with greater complaints of visual disturbance.
  
  
  CONCLUSIONS
  The SN6AD1 MIOL provides significantly better UNVA, DCNVA and UIVA under high contrast conditions, and better Chinese character near visual acuity. Patients receiving the SN6AD1 MIOL reported a better quality of vision in spite of more serious visual disturbances. Better UIVA was observed in emmetropic and mildly myopic eyes.
authors.affiliation: Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Sun
authors.forename: Danying
authors.initials: D
authors.lastname: Zheng
authors.forename: Shiqi
authors.initials: S
authors.lastname: Ling
authors.forename: Tingting
authors.initials: T
authors.lastname: Song
authors.forename: Yizhi
authors.initials: Y
authors.lastname: Liu
mesh_terms: D015350:Contrast Sensitivity; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D011446:Prospective Studies; D011788:Quality of Life; D011795:Surveys and Questionnaires; D014785:Vision, Ocular; D014792:Visual Acuity