May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
On and Off-Axis Comparative Contrast Sensitivity Performance of Progressive Addition Lenses
Author Affiliations & Notes
  • R. J. Nason
    Institute for Vision Research, Manhattan Vision Associates, NYC, New York
  • G. A. Zikos
    Institute for Vision Research, Manhattan Vision Associates, NYC, New York
  • S. Ali
    Institute for Vision Research, Manhattan Vision Associates, NYC, New York
  • A. Selenow
    Institute for Vision Research, Manhattan Vision Associates, NYC, New York
  • Footnotes
    Commercial Relationships  R.J. Nason, Essilor, C; G.A. Zikos, Essilor, F; S. Ali, Essilor, F; A. Selenow, Essilor, F.
  • Footnotes
    Support  Essilor
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 3329. doi:https://doi.org/
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    • Get Citation

      R. J. Nason, G. A. Zikos, S. Ali, A. Selenow; On and Off-Axis Comparative Contrast Sensitivity Performance of Progressive Addition Lenses. Invest. Ophthalmol. Vis. Sci. 2008;49(13):3329. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract
 
Purpose:
 

To compare the contrast sensitivity function of a conventional PAL to new digitally surfaced designs with wavefront optimization, for both on and off-axis distance viewing.

 
Methods:
 

Contrast sensitivity (CS) was tested at 4, 8, 12 and 20 cpd at a test distance of 3 meters utilizing the Cambridge Research Systems Ltd. ViSaGe with a SONY GDM-F20 CRTand the Metropsis time interval, two-alternative, forced choice QUEST protocol. The subjects were tested gazing through a 6 mm aperture at the following three points in the lenses: Central fitting point (C), 12.5 deg temporally to the distance fitting point (I) and 6 deg below the fitting point (T). 28 eyes of presbyopic subjects (mean age 55 yo) were tested. All eyes were myopic (-0.75D to -8.00D Mean=-3.54D) with astigmatism (-1.25 to -2.50 mean=-1.69). Two lens designs were tested. A conventional (Panamic) and a digitally surfaced design with wavefront optimization (Physio).

 
Results:
 

CS improvements up to 20% (C), 27% (I), 72% (T) and 22% overall were measured with the Physio vs. the Panamic.  

 
Conclusions:
 

In-Vivo contrast sensitivity with PALsmay be improved with newer designs.

 
Keywords: contrast sensitivity • presbyopia • spectacle lens 
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