title: Matched comparison of rotational stability of 1-piece acrylic and plate-haptic silicone toric intraocular lenses in Asian eyes.
abstract: OBJECTIVE
  To evaluate and compare the postoperative rotational stability of a 1-piece acrylic toric intraocular lens (IOL) (Acrysof) and a plate-haptic silicone toric IOL (Staar) in Asian eyes.
  
  
  METHODS
  Singapore National Eye Centre, Singapore.
  
  
  METHODS
  Prospective randomized control trial.
  
  
  METHODS
  Eyes of Chinese patients having cataract surgery were randomized to receive the acrylic toric IOL or the silicone toric IOL. Postoperatively, patients returned at 1 day, 1 week, and 1 and 3 months. The eyes were dilated and slitlamp retroillumination photography of the toric IOL was performed to assess rotational stability.
  
  
  RESULTS
  The acrylic IOL was implanted in 24 eyes and the silicone IOL in 26 eyes. The mean age of the patients was 68.2 years (range 42 to 82 years). The mean IOL rotation from baseline to 3 months postoperatively was 4.23 ± 4.28 degrees in the acrylic IOL group and 9.42 ± 7.80 degrees in the silicone IOL group; the difference was statistically significant (P=.01). Of the acrylic IOLs, 73% were rotated less than 5 degrees at 3 months; none was rotated more than 15 degrees at 3 months. The silicone toric IOLs showed greater rotational movement, with 37% being rotated less than 5 degrees and 21% being rotated more than 15 degrees.
  
  
  CONCLUSIONS
  The acrylic toric IOL had better rotational stability than the silicone toric IOL.
authors.affiliation: Singapore National Eye Centre, Singapore. chua_wh@hotmail.com
authors.forename: Wei-Han
authors.initials: WH
authors.lastname: Chua
authors.forename: Leonard H
authors.initials: LH
authors.lastname: Yuen
authors.forename: Jocelyn
authors.initials: J
authors.lastname: Chua
authors.forename: Gillian
authors.initials: G
authors.lastname: Teh
authors.forename: Warren E
authors.initials: WE
authors.lastname: Hill
mesh_terms: D000180:Acrylic Resins; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D060437:Artificial Lens Implant Migration / Q000208:ethnology*; D044466:Asian People / Q000208:ethnology*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology; D012399:Rotation; D012826:Silicone Elastomers; D012846:Singapore / Q000453:epidemiology; D014792:Visual Acuity / Q000502:physiology
chemical_list: D000180:Acrylic Resins; D012826:Silicone Elastomers