Effect of the speed of sound in Sensar acrylic lenses on pseudophakic axial length measurements.
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.
Lowery
Michael D
MD
Allergan, Inc., Irvine, California 92612-1599, USA. lowery_michael@allergan.com
Makker
Harish
H
Lang
Alan
A
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
D000180:Acrylic Resins; D012826:Silicone Elastomers; D019904:Polymethyl Methacrylate