title: Visual acuity from far to near and contrast sensitivity in eyes with a diffractive multifocal intraocular lens with a low addition power.
abstract: OBJECTIVE
  To compare visual acuity from far to near, contrast visual acuity, and acuity in the presence of glare (glare visual acuity) between an aspheric diffractive multifocal intraocular lens (IOL) with a low addition (add) power (+3.0 diopters) and a monofocal IOL.
  
  
  METHODS
  Hayashi Eye Hospital, Fukuoka, Japan.
  
  
  METHODS
  This prospective study comprised patients having implantation of an aspheric diffractive multifocal ReSTOR SN6AD1 IOL with a +3.0 D add (multifocal group) or a monofocal AcrySof IQ SN60WF IOL (monofocal group). Visual acuity from far to near distances, contrast acuity, and glare acuity were evaluated 3 months postoperatively.
  
  
  RESULTS
  Each IOL group comprised 64 eyes of 32 patients. For monocular and binocular visual acuity, the mean uncorrected and distance-corrected intermediate acuity at 0.5 m and the near acuity at 0.3 m were significantly better in the multifocal group than in the monofocal group (P</=.0035); distance and intermediate acuity at 0.7 m and 1.0 m were similar between the 2 groups. No significant differences were observed between groups in contrast acuity and glare acuity under photopic and mesopic conditions. Furthermore, no significant correlation was found between all-distance acuity and pupil diameter or between visual acuity and IOL decentration and tilt.
  
  
  CONCLUSIONS
  The diffractive multifocal IOL with a low add power provided significantly better intermediate and near visual acuity than the monofocal IOL. Contrast sensitivity with and without glare was reduced with the multifocal IOL, and all-distance visual acuity was independent of pupil diameter and IOL displacement.
authors.affiliation: Hayashi Eye Hospital, 4-7-13 Hakataekimae, Hakata-Ku, Fukuoka 812-0011, Japan. hayashi-ken@hayashi.or.jp
authors.forename: Ken
authors.initials: K
authors.lastname: Hayashi
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Manabe
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Hayashi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015350:Contrast Sensitivity / Q000502:physiology*; D005260:Female; D019466:Glare; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011446:Prospective Studies; D019591:Pseudophakia / Q000503:physiopathology*; D015348:Vision, Binocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology*