Spherical aberration and other higher-order aberrations in the human eye: from summary wave-front analysis data to optical variables relevant to visual perception

Nomdo M. Jansonius*

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    9 Citations (Scopus)

    Abstract

    Wave-front analysis data from the human eye are commonly presented using the aberration coefficient c(4)(0) (primary spherical aberration) together with an overall measure of all higher-order aberrations. If groups of subjects are compared, however, the relevance of an observed difference cannot easily be assessed from these summary aberration measures. A method was developed for estimating various optical variables relevant to visual perception from summary wave-front analysis data. These variables were the myopic shift (the difference in the optimal focus between high and low spatial frequencies, a threat to the simultaneous in-focus viewing of fine and coarse patterns), the depth-of-focus (at 8 cpd), and the modulation transfer at high (16 cpd; reading small print) and low (4 cpd; edge detection) spatial frequencies. The depth-of-focus was defined in two ways: using a relative measure (the full width at half-height of the through-focus curve) and an absolute measure (the range where the through-focus curve exceeds a predefined modulation transfer value). The method was shown to be accurate by using previously published contrast sensitivity data and wave-front analysis data. The applicability of the method was illustrated by applying the method to wave-front analysis measurements performed in pseudophakic patients with aspheric and spherical intraocular lenses. (C) 2010 Optical Society of America

    Original languageEnglish
    Pages (from-to)941-950
    Number of pages10
    JournalJournal of the optical society of america a-Optics image science and vision
    Volume27
    Issue number5
    DOIs
    Publication statusPublished - May-2010

    Keywords

    • RETINAL IMAGE QUALITY
    • CONTRAST SENSITIVITY
    • INTRAOCULAR LENSES
    • MONOCHROMATIC ABERRATIONS
    • MODULATION TRANSFER
    • STATISTICAL-MODEL
    • POPULATION
    • FOCUS
    • PERFORMANCE
    • DEFOCUS

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