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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 3, Iss. 5 — May. 1, 2012
  • pp: 863–877

Chaos in ocular aberration dynamics of the human eye

Karen M. Hampson and Edward A. H. Mallen  »View Author Affiliations

Biomedical Optics Express, Vol. 3, Issue 5, pp. 863-877 (2012)

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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 µm/s. This indicates that the aberration dynamics are chaotic. Implications for future modeling are discussed.

© 2012 OSA

OCIS Codes
(330.4875) Vision, color, and visual optics : Optics of physiological systems
(330.7326) Vision, color, and visual optics : Visual optics, modeling

ToC Category:
Ophthalmology Applications

Original Manuscript: February 27, 2012
Revised Manuscript: March 25, 2012
Manuscript Accepted: March 30, 2012
Published: April 5, 2012

Karen M. Hampson and Edward A. H. Mallen, "Chaos in ocular aberration dynamics of the human eye," Biomed. Opt. Express 3, 863-877 (2012)

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