Chaos in ocular aberration dynamics of the human eye.

Biomedical Optics Express
Karen M Hampson, Edward A H Mallen

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

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Citations

Dec 11, 2013·Optics Letters·Varadharajan JayakumarVasudevan Lakshminarayanan
Dec 11, 2013·Optics Letters·Karen M HampsonEdward A H Mallen
Feb 6, 2013·Optics Letters·Karen M Hampson, Edward A H Mallen
Aug 26, 2015·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·W Neil Charman, Gordon Heron
Jun 24, 2017·Bulletin of Mathematical Biology·Karen M HampsonEdward A H Mallen
Sep 6, 2018·Vision·Niall J HynesEdward A H Mallen

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