title: [Comparison of tilt and decentration of four different kinds of aspheric intraocular lenses implantation].
abstract: OBJECTIVE
  To measure tilt and decentration of four different kinds of aspheric intraocular lenses (IOLs) with Scheimpflug imaging systems after cataract surgery.
  
  
  METHODS
  One hundred and thirty eyes undertaken cataract surgery and IOLs implantation, including four different kinds of aspheric IOLs [1-piece hydrophilic acrylic IOLs (Akreos AO, Bausch & Lomb); 3-piece acrylic IOLs (Tecnis9003, AMO); 1-piece acrylic IOLs (SN60WF, Alcon) and 1-piece hydrophilic acrylic IOLs (920H, Rayner)] and 3-piece acrylic spherical IOLs (AR40e, AMO), were retrospectively reviewed. Tilt and decentration of IOLs were measured using Scheimpflug system (Pentacam, Oculus) and analyzed with Image-pro plus 6.0 software.
  
  
  RESULTS
  Except tilt of AR40e group, the vertical and horizontal tilt and decentration for other groups did not differ significantly. The mean IOL tilt in AO, Z9003, IQ, 920H, AR40e was 2.08 degrees, 2.58 degrees, 1.72 degrees, 1.81 degrees, and 3.22 degrees, respectively, which showed statistically significant differences (F = 4.511, P = 0.003). The mean IOL decentration in AO, Z9003, IQ, 920H and AR40e was 0.04, 0.24, 0.25, 0.19 and 0.18 mm, respectively, which showed significant difference in vertical direction (F = 4.162, P = 0.047). The average tilt significantly correlated with amount of decentration in Z9003 IOL (r = -0.517, P = 0.034).
  
  
  CONCLUSIONS
  In different types of aspheric IOL implanted within the capsule, tilt and decentration in 1-piece and 4-point haptic IOL are less than those in 3-piece and 2-point haptic IOL.
authors.affiliation: Tianjin Eye Hospital, Tianjin 300020, China.
authors.forename: Xiao-jie
authors.initials: XJ
authors.lastname: Xing
authors.forename: Xin
authors.initials: X
authors.lastname: Tang
authors.forename: Hui
authors.initials: H
authors.lastname: Song
authors.forename: Wei-wei
authors.initials: WW
authors.lastname: Li
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D019544:Equipment Failure Analysis; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000295:instrumentation*; D007910:Lenses, Intraocular; D008875:Middle Aged; D012189:Retrospective Studies