title: Rotational performance and corneal astigmatism correction during cataract surgery: aspheric toric intraocular lens versus aspheric nontoric intraocular lens with opposite clear corneal incision.
abstract: OBJECTIVE
  To compare the astigmatism-reducing effect of an aspheric toric intraocular lens (IOL) and an aspheric nontoric IOL with an opposite clear corneal incision (OCCI) in cataract surgery.
  
  
  METHODS
  Vienna Institute for Research in Ocular Surgery, Hanusch Hospital, Vienna, Austria.
  
  
  METHODS
  Prospective randomized clinical study.
  
  
  METHODS
  Patients with low to moderate corneal astigmatism scheduled for cataract surgery received an aspheric toric IOL (Lentis L-312T) or an aspheric nontoric IOL (Lentis L-312) combined with an OCCI. Keratometry and corneal tomography were performed 1 hour, 1 week, 3 months and 9 months postoperatively. Postoperative residual astigmatism was measured using an autorefractor. Rotational toric IOL stability was analyzed using retroillumination photography.
  
  
  RESULTS
  Fifty-five patients were included. Three months postoperatively, the mean reduction in corneal astigmatism was 0.67 diopter (D) ± 0.58 (SD) in the toric group and 0.18 ± 0.52 D in the nontoric-OCCI group. The mean uncorrected distance visual acuity was 0.29 ± 0.30 logMAR and 0.09 ± 0.18 logMAR, respectively (P=.02). The mean refractive astigmatism was 1.02 ± 0.54 D and 0.68 ± 0.52 D, respectively (P=.05). One hour, 3 months, and 9 months postoperatively, the mean absolute IOL misalignment of toric IOLs was 4.99 ± 4.66 degrees, 13.59 ± 11.29 degrees, and 19.90 ± 14.48 degrees, respectively.
  
  
  CONCLUSIONS
  The toric IOL tended to rotate significantly postoperatively. Visual acuity was good in both groups. Residual refractive cylinder was significantly lower in the toric IOL group.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Vienna Institute for Research in Ocular Surgery (Maedel, Hirnschall, Chen, Findl), a Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria; Moorfields Eye Hospital (Hi, Findl) NHS Foundation Trust, London, United Kingdom.
authors.forename: Sophie
authors.initials: S
authors.lastname: Maedel
authors.affiliation: From the Vienna Institute for Research in Ocular Surgery (Maedel, Hirnschall, Chen, Findl), a Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria; Moorfields Eye Hospital (Hi, Findl) NHS Foundation Trust, London, United Kingdom.
authors.forename: Nino
authors.initials: N
authors.lastname: Hirnschall
authors.affiliation: From the Vienna Institute for Research in Ocular Surgery (Maedel, Hirnschall, Chen, Findl), a Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria; Moorfields Eye Hospital (Hi, Findl) NHS Foundation Trust, London, United Kingdom.
authors.forename: Yen-An
authors.initials: YA
authors.lastname: Chen
authors.affiliation: From the Vienna Institute for Research in Ocular Surgery (Maedel, Hirnschall, Chen, Findl), a Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria; Moorfields Eye Hospital (Hi, Findl) NHS Foundation Trust, London, United Kingdom. Electronic address: oliver@findl.at.
authors.forename: Oliver
authors.initials: O
authors.lastname: Findl
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D060437:Artificial Lens Implant Migration / Q000209:etiology*; D001251:Astigmatism / Q000150:complications / Q000601:surgery*; D002386:Cataract / Q000150:complications; D063171:Corneal Pachymetry; D019781:Corneal Topography; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011183:Postoperative Complications; D011446:Prospective Studies; D011474:Prosthesis Design; D012029:Refraction, Ocular / Q000502:physiology; D012399:Rotation; D014792:Visual Acuity / Q000502:physiology