title: High-order aberrations in pseudophakia with different intraocular lenses.
abstract: OBJECTIVE
  To compare high-order aberrations in patients who had cataract surgery and implantation of different types of intraocular lenses (IOLs).
  
  
  METHODS
  Sir Charles Gairdner Hospital and Lions Eye Institute, University of Western Australia, Perth, Australia.
  
  
  METHODS
  Fifty eyes of 48 patients were included in this study. The optical aberrations were measured with the Hartmann-Shack wavefront sensor (Zyoptix, Bausch & Lomb) before and after surgery using a 5.0 mm wavefront aperture diameter for all comparisons. The eyes were divided into 4 groups according to the type of IOL (material and curvature). A fifth group of 10 eyes of 6 elderly patients with normal crystalline lenses had the same examination.
  
  
  RESULTS
  There was no statistical difference in high-order aberrations between the 2 acrylic IOL groups with different curvatures (P>.05) or between the silicone and poly(methyl methacrylate) (PMMA) IOL groups (P>.05). However, the measured high-order aberrations were significantly higher (3rd through 5th order) in the 2 acrylic IOL groups than in the PMMA and silicone IOL groups (P<.05).
  
  
  CONCLUSIONS
  An increase in IOL high-order aberrations contributed to the decline in retinal image quality. An IOL modifies the entire aberration pattern of the eye. There was a statistically significant increase in aberrations in patients with an acrylic IOL compared to those with a silicone or PMMA IOL. The exact mechanism is uncertain. Further study is required to optimize IOL design.
authors.affiliation: Lions Eye Institute, Perth, Australia.
authors.forename: Lucas
authors.initials: L
authors.lastname: Vilarrodona
authors.forename: Graham D
authors.initials: GD
authors.lastname: Barrett
authors.forename: Bradley
authors.initials: B
authors.lastname: Johnson
mesh_terms: D000180:Acrylic Resins; D000368:Aged; D000369:Aged, 80 and over; D001672:Biocompatible Materials; D003941:Diagnostic Techniques, Ophthalmological; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008875:Middle Aged; D018918:Phacoemulsification; D019904:Polymethyl Methacrylate; D011446:Prospective Studies; D019591:Pseudophakia / Q000150:complications*; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000175:diagnosis / Q000209:etiology*; D012826:Silicone Elastomers; D014792:Visual Acuity
chemical_list: D000180:Acrylic Resins; D001672:Biocompatible Materials; D012826:Silicone Elastomers; D019904:Polymethyl Methacrylate