May 2005
Volume 46, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2005
Optical and Visual Performance Are Well Correlated in Pseudophakic Eyes
Author Affiliations & Notes
  • P.A. Piers
    Applied Research, AMO, Groningen, The Netherlands
  • J. Tabernero
    Laboratorio de Optica, Universidad de Murcia, Murcia, Spain
  • A. Benito
    Laboratorio de Optica, Universidad de Murcia, Murcia, Spain
  • M. Redondo
    Clínica Ircovision, Cartagena, Spain
  • P. Artal
    Laboratorio de Optica, Universidad de Murcia, Murcia, Spain
  • Footnotes
    Commercial Relationships  P.A. Piers, AMO Inc. E; J. Tabernero, AMO Inc. C; A. Benito, AMO Inc. C; M. Redondo, AMO Inc. C; P. Artal, AMO Inc. C, P.
  • Footnotes
    Support  AMO Inc.
Investigative Ophthalmology & Visual Science May 2005, Vol.46, 702. doi:
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    • Get Citation

      P.A. Piers, J. Tabernero, A. Benito, M. Redondo, P. Artal; Optical and Visual Performance Are Well Correlated in Pseudophakic Eyes . Invest. Ophthalmol. Vis. Sci. 2005;46(13):702.

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

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Abstract

Abstract: : Purpose: To study the relationship between various measures of optical and visual performance in pseudophakic eyes implanted with both conventional and wave–front modified IOLs. Methods: Ocular and corneal aberrations, visual acuity and contrast sensitivity are measured in 7 pseudophakic eyes implanted with two IOLs: the Tecnis Z9000 (a wavefront modified IOL), and CeeOn 911A (a spherically surfaced IOL). Ocular aberrations are measured using a Hartmann–Shack wavefront sensor while corneal aberrations are determined by combining ray–tracing techniques with corneal topography. IOL misalignments were measured using a Purkinje image apparatus. Visual acuity and contrast sensitivity of each patient are measured using a robust forced–choice psychophysical approach implemented with a Cambridge Research system. From the ocular wavefront aberration the optical modulation transfer function (MTF) of each individual eye is calculated and compared with the corresponding patient’s visual performance. Results: The patients’ measured visual acuities are highly correlated with their measured optical quality in terms of SA, RMS wavefront aberration and MTF (R2 = 0.61, 0.45 and 0.56 respectively), as are their measured contrast sensitivities (R2 = 0.31, 0.75, 0.71). The optical and visual quality of the Tecnis lens remains superior for a clinically normal range of misalignments (decentration ≤ 0.6mm, tilt ≤ 10°). Conclusions: The high degree of correlation between optical and visual data suggest that eye models constructed from clinical data are useful tools in predicting the clinical performance of new IOL designs.

Keywords: optical properties • contrast sensitivity • cataract 
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