Cargando…

Multifractal nature of ocular aberration dynamics of the human eye

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 analyt...

Descripción completa

Detalles Bibliográficos
Autores principales: Hampson, Karen M., Mallen, Edward A. H.
Formato: Texto
Lenguaje:English
Publicado: Optical Society of America 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3047352/
https://www.ncbi.nlm.nih.gov/pubmed/21412452
http://dx.doi.org/10.1364/BOE.2.000464
_version_ 1782199029746106368
author Hampson, Karen M.
Mallen, Edward A. H.
author_facet Hampson, Karen M.
Mallen, Edward A. H.
author_sort Hampson, Karen M.
collection PubMed
description 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.
format Text
id pubmed-3047352
institution National Center for Biotechnology Information
language English
publishDate 2011
publisher Optical Society of America
record_format MEDLINE/PubMed
spelling pubmed-30473522011-03-16 Multifractal nature of ocular aberration dynamics of the human eye Hampson, Karen M. Mallen, Edward A. H. Biomed Opt Express Vision, Color, and Visual Optics 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. Optical Society of America 2011-02-01 /pmc/articles/PMC3047352/ /pubmed/21412452 http://dx.doi.org/10.1364/BOE.2.000464 Text en ©2011 Optical Society of America http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Unported License, which permits download and redistribution, provided that the original work is properly cited. This license restricts the article from being modified or used commercially.
spellingShingle Vision, Color, and Visual Optics
Hampson, Karen M.
Mallen, Edward A. H.
Multifractal nature of ocular aberration dynamics of the human eye
title Multifractal nature of ocular aberration dynamics of the human eye
title_full Multifractal nature of ocular aberration dynamics of the human eye
title_fullStr Multifractal nature of ocular aberration dynamics of the human eye
title_full_unstemmed Multifractal nature of ocular aberration dynamics of the human eye
title_short Multifractal nature of ocular aberration dynamics of the human eye
title_sort multifractal nature of ocular aberration dynamics of the human eye
topic Vision, Color, and Visual Optics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3047352/
https://www.ncbi.nlm.nih.gov/pubmed/21412452
http://dx.doi.org/10.1364/BOE.2.000464
work_keys_str_mv AT hampsonkarenm multifractalnatureofocularaberrationdynamicsofthehumaneye
AT mallenedwardah multifractalnatureofocularaberrationdynamicsofthehumaneye