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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 3 — Feb. 1, 2010
  • pp: 2668–2681

Temporal dynamics and statistical characteristics of the microfluctuations of accommodation: Dependence on the mean accommodative effort

C. Leahy, C. Leroux, C. Dainty, and L. Diaz-Santana  »View Author Affiliations


Optics Express, Vol. 18, Issue 3, pp. 2668-2681 (2010)
http://dx.doi.org/10.1364/OE.18.002668


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Abstract

Microfluctuations of accommodation have been the subject of many studies. New technological developments now permit us to study the dynamics of the microfluctuations with unprecedented resolution and accuracy. We aim to characterise their temporal statistics for different levels of accommodative effort, using a custom-built aberrometer. We conducted 46 s long measurements on the dominant eye of 9 young, healthy subjects. The ocular wavefront was sampled every 250 μm across the 3.9 mm measured pupil, at a frame rate of 173 Hz. This enabled us to obtain high resolution estimates of the Power Spectral Density (PSD). Results show that the shape of the estimated PSD for a 4 D effort is distinct from the shape for the two extrema of the accommodation range. The autocorrelation function of the increments of the accommodation signal is also affected by the level of effort, regardless of the refractive error of the subject.

© 2010 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(330.7322) Vision, color, and visual optics : Visual optics, accommodation

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: November 25, 2009
Revised Manuscript: January 10, 2010
Manuscript Accepted: January 19, 2010
Published: January 25, 2010

Virtual Issues
Vol. 5, Iss. 4 Virtual Journal for Biomedical Optics

Citation
C. Leahy, C. Leroux, C. Dainty, and L. Diaz-Santana, "Temporal dynamics and statistical characteristics of the microfluctuations of accommodation: Dependence on the mean accommodative effort," Opt. Express 18, 2668-2681 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-3-2668


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