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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 2, Iss. 3 — Mar. 1, 2011
  • pp: 464–470

Multifractal nature of ocular aberration dynamics of the human eye

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


Biomedical Optics Express, Vol. 2, Issue 3, pp. 464-470 (2011)
http://dx.doi.org/10.1364/BOE.2.000464


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Abstract

Ocular monochromatic aberrations display dynamic behavior even when the eye is fixating on a stationary stimulus. The fluctuations are commonly characterized in the frequency domain using the power spectrum obtained via the Fourier transform. In this paper we used a wavelet-based multifractal analytical approach to provide a more in depth analysis of the nature of the aberration fluctuations. The aberrations of five subjects were measured at 21 Hz using an open-view Shack-Hartmann sensor. We show that the aberration dynamics are multifractal. The most frequently occurring Hölder exponent for the rms wavefront error, averaged across the five subjects, was 0.31 ± 0.10. This suggests that the time course of the aberration fluctuations is antipersistant. Future applications of multifractal analysis are discussed.

© 2011 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:
Vision, Color, and Visual Optics

History
Original Manuscript: November 12, 2010
Revised Manuscript: January 18, 2011
Manuscript Accepted: January 26, 2011
Published: February 1, 2011

Citation
Karen M. Hampson and Edward A. H. Mallen, "Multifractal nature of ocular aberration dynamics of the human eye," Biomed. Opt. Express 2, 464-470 (2011)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-2-3-464


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