title: Long-term clinical outcomes of toric intraocular lens implantation in cataract cases with preexisting astigmatism.
abstract: OBJECTIVE
  To evaluate the long-term clinical outcomes and rotational stability of toric intraocular lenses (IOLs) to correct preexisting astigmatism in cataract patients.
  
  
  METHODS
  Kitasato University Hospital, Kanagawa, Japan.
  
  
  METHODS
  Prospective observational study.
  
  
  METHODS
  Phacoemulsification with implantation of a toric IOL (Acrysof IQ toric SN6AT) was performed in cataract patients with corneal astigmatism. The postoperative follow-up was up to 2 years.
  
  
  RESULTS
  This study enrolled 378 eyes of 302 patients with a mean age of 63.4 years ± 16.9 (SD). The corrected distance visual acuity 3 months postoperatively was 20/25 or better in 94.7% of eyes. The mean refractive cylinder was -1.92 ± 1.45 diopters (D) preoperatively, -0.59 ± 0.62 D 3 months postoperatively (322 eyes), and -0.67 ± 0.90 D at 2 years (73 eyes). There were statistically significant differences between the preoperative and 3-month postoperative measurements (P<.001, Wilcoxon signed-rank test). The mean IOL misalignment was 4.1 ± 3.0 degrees 2 years postoperatively. The mean IOL rotation was 4.5 ± 4.9 degrees within 1 day postoperatively. The rotation was more than 20 degrees in 6 eyes, all of which had an axial length (AL) of more than 25.0 mm. All rotations occurred within 10 days postoperatively.
  
  
  CONCLUSIONS
  Toric IOLs were effective in reducing preexisting corneal astigmatism and had overall good rotational stability. A large degree of IOL rotation might occur in eyes with a relatively long AL, especially during the early postoperative period. The 6 rotated IOLs were implanted to correct with-the-rule astigmatism.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan. Electronic address: ys01.w.mmipfirdf@gmail.com.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Miyake
authors.affiliation: From the Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Kamiya
authors.affiliation: From the Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
authors.forename: Rie
authors.initials: R
authors.lastname: Amano
authors.affiliation: From the Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Iida
authors.affiliation: From the Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
authors.forename: Shuntaro
authors.initials: S
authors.lastname: Tsunehiro
authors.affiliation: From the Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
authors.forename: Kimiya
authors.initials: K
authors.lastname: Shimizu
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D002386:Cataract / Q000150:complications / Q000503:physiopathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011446:Prospective Studies; D011474:Prosthesis Design; D019591:Pseudophakia / Q000503:physiopathology; D012029:Refraction, Ocular / Q000502:physiology*; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology*