title: [Factors Affecting Uncorrected Visual Acuity following Implantation of Apodized Diffractive Intraocular Lenses].
abstract: OBJECTIVE
  To investigate the preoperative factors affecting postoperative uncorrected visual acuity (UCVA) equal to or more than 20/20.
  
  
  METHODS
  One hundred sixty seven eyes receiving apodized diffractive multifocal intraocular lenses (SN6AD1) were included in this study. In the eyes with corneal astigmatism of less than 1.0 D, a 2.4 mm clear temporal corneal incision was created. In those equal to or more than 1.0 D, 4.1 mm steepest meridian clear corneal incisions and/or limbal relaxing incisions were conducted. Preoperative factors affecting postoperative UCVA equal to or more than 20/20 were assessed by univariate analysis and multiple logistic regression analysis.
  
  
  RESULTS
  Patient's age and preoperative corneal astigmatism were significant in both univariate analysis and multiple logistic regression analysis. The ratio of postoperative UCVA equal to or more than 20/20 was significantly lower in the patients 70 years or older and in the eyes with corneal astigmatism equal to or more than 1.5 D.
  
  
  CONCLUSIONS
  Multifocal toric intraocular lenses provide better surgical results in eyes with corneal astigmatism, however patient's age needs to be considered as a factor affecting UCVA.
authors.forename: Takahisa
authors.initials: T
authors.lastname: Koga
authors.forename: Tomoyo
authors.initials: T
authors.lastname: Koga
mesh_terms: D017677:Age Distribution; D000368:Aged; D001251:Astigmatism / Q000601:surgery*; D003316:Corneal Diseases / Q000601:surgery*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D014792:Visual Acuity