title: Comparison of pseudophakic retinal straylight in spherical/aspherical and hydrophobic/hydrophilic intraocular lens.
abstract: OBJECTIVE
  To study the potential reasons of increased straylight in pseudophakic eyes.
  
  
  METHODS
  Cross-sectional study. Seventy patients diagnosed as bilateral age-related cataract and implanted with Tecnis ZA9003, Sensar AR40e, SA60AT, XLSTABI ZO or Akeros AO intraocular lens (IOL) were enrolled in this research. Straylight was measured by a C-Quant straylight meter three to four weeks postoperatively. Five different modalities of IOL, including spherical/aspherical optics and hydrophobic/hydrophilic material were tested in this study. Normal as well as dilated pupils were used. The main outcome variable for straylight measurement was the logarithmic straylight parameter, log(s).
  
  
  RESULTS
  The straylight parameter increased significantly after pupil dilation (P<0.05). Straylight of aspherical IOL was significantly higher after pupil dilation (P<0.05) compared to spherical IOL. In normal pupil, straylight of hydrophobic IOL was significant higher when compared with hydrophilic IOL (P<0.05).
  
  
  CONCLUSIONS
  Straylight and visual acuity stand for the different aspects of visual function. Several factors including pupil diameter, optic material, aspherical design of IOL influence intraocular light scattering in pseudophakic eyes. Further investigation was needed to study the impact of optic material and optic surface design on pseudophakic straylight.
authors.affiliation: Cataract Center, Tianjin Eye Hospital, Tianjin 300020, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Tang
authors.affiliation: Cataract Center, Tianjin Eye Hospital, Tianjin 300020, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Song
authors.affiliation: Cataract Center, Tianjin Eye Hospital, Tianjin 300020, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.affiliation: Cataract Center, Tianjin Eye Hospital, Tianjin 300020, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Tang
keywords: light scattering; pseudophakia; retinal straylight