May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Interaction Between Primary and Secondary Spherical Aberrations and Its Impact on Retinal Image Quality Through Focus
Author Affiliations & Notes
  • L. J. Nagy
    University of Rochester, Rochester, New York
    Biomedical Engineering,
    Ophthalmology,
  • G. Yoon
    University of Rochester, Rochester, New York
    Biomedical Engineering,
    Ophthalmology,
  • Footnotes
    Commercial Relationships  L.J. Nagy, None; G. Yoon, Bausch & Lomb, F; Bausch & Lomb, C.
  • Footnotes
    Support  NIH/NEI grant R01EY014999, Research to Prevent Blindness
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 2422. doi:https://doi.org/
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    • Get Citation

      L. J. Nagy, G. Yoon; Interaction Between Primary and Secondary Spherical Aberrations and Its Impact on Retinal Image Quality Through Focus. Invest. Ophthalmol. Vis. Sci. 2008;49(13):2422. doi: https://doi.org/.

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

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Abstract

Purpose: : It has been proposed that spherical aberrations (SA) can improve retinal image quality for a greater depth of focus with a single optical element. This study was performed to understand how primary and secondary SA can affect the resultant retinal image quality (RIQ) through focus.

Methods: : Primary (Z40) and secondary (Z60) SA were modeled using a custom made algorithm in Matlab. The aberration interaction was calculated for a 4.5mm pupil in monochromatic light (0.632µm) from 0 to 3 diopters (D). The area under the visual Strehl optical transfer function (AVSOTF) was calculated to predict visual performance as a function of focal ranges (distance = 0 to 0.75D, intermediate = 1 to 1.75D and near = 2 to 3D). In this model, interactions were optimized for distance RIQ which was chosen as the maximum VSOTF value for each interaction.

Results: : With primary SA alone, intermediate and near RIQ began to dominate the AVSOTF at -0.2µm and -0.4 µm respectively with diminished distance RIQ at these points. On the contrary, both positive and negative values of secondary SA produced optimal intermediate and near RIQ. There was a strong positive correlation between primary SA and positive secondary SA (R2 >0.97) when they interact with each other. The ratios of secondary SA to primary SA for the intermediate and near peaks were 0.35 ± 0.01. The difference in secondary SA between the intermediate and near peaks was constant (0.1 ± 0.01 µm). The equivalent RIQ for intermediate and near focal ranges was obtained at half the secondary SA difference between the peaks.

Keywords: intraocular lens • aberrations 
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