title: Effect of the speed of sound in Sensar acrylic lenses on pseudophakic axial length measurements.
abstract: OBJECTIVE
  To evaluate adjusting for the change in sound velocity through an intraocular lens (IOL) to determine axial length measurements in pseudophakic eyes.
  
  
  METHODS
  Allergan, Inc., Irvine, California, USA.
  
  
  METHODS
  The effect of sound velocity through the Sensar (Allergan) acrylic IOL was evaluated using a previously published methodology.
  
  
  RESULTS
  The analysis yielded the correction factors for pseudophakic axial length measurements for Sensar acrylic and SLM-2 silicone (Allergan) IOLs.
  
  
  CONCLUSIONS
  The sound speed for the Sensar acrylic IOL differs significantly from that of PMMA and various silicone materials. Corrections for material sound speed must be made to obtain correct pseudophakic axial lengths.
authors.affiliation: Allergan, Inc., Irvine, California 92612-1599, USA. lowery_michael@allergan.com
authors.forename: Michael D
authors.initials: MD
authors.lastname: Lowery
authors.forename: Harish
authors.initials: H
authors.lastname: Makker
authors.forename: Alan
authors.initials: A
authors.lastname: Lang
mesh_terms: D000180:Acrylic Resins; D005123:Eye / Q000033:anatomy & histology*; D007910:Lenses, Intraocular; D019904:Polymethyl Methacrylate; D019591:Pseudophakia / Q000000981:diagnostic imaging*; D012029:Refraction, Ocular; D012826:Silicone Elastomers; D013016:Sound; D014463:Ultrasonography
chemical_list: D000180:Acrylic Resins; D012826:Silicone Elastomers; D019904:Polymethyl Methacrylate