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    Chaos in ocular aberration dynamics of the human eye

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    Publication date
    2012
    Author
    Hampson, Karen M.
    Mallen, Edward A.H.
    Keyword
    REF 2014; Human eye; Visual optics; Power spectrum; Ocular aberration dynamics
    
    Metadata
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    Abstract
    Since the characterization of the eye's monochromatic aberration fluctuations in 2001, the power spectrum has remained the most widely used method for analyzing their dynamics. However, the power spectrum does not capture the complexities of the fluctuations. We measured the monochromatic aberration dynamics of six subjects using a Shack-Hartmann sensor sampling at 21 Hz. We characterized the dynamics using techniques from chaos theory. We found that the attractor embedding dimension for all aberrations, for all subjects, was equal to three. The embedding lag averaged across aberrations and subjects was 0.31 +/- 0.07 s. The Lyapunov exponent of the rms wavefront error was positive for each subject, with an average value of 0.44 +/- 0.15 microm/s. This indicates that the aberration dynamics are chaotic. Implications for future modeling are discussed.
    URI
    http://hdl.handle.net/10454/6002
    Citation
    Hampson, K. M., Mallen, E. A. (2012) Chaos in ocular aberration dynamics of the human eye. Biomedical Optics Express, 3(5), 863-877.
    Link to publisher’s version
    http://dx.doi.org/10.1364/BOE.3.000863
    Type
    Article
    Collections
    Life Sciences Publications

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