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Optics Express

Optics Express

  • Editor: C. Martijin de Sterke
  • Vol. 15, Iss. 9 — Apr. 30, 2007
  • pp: 5649–5663

New methodology to measure the dynamics of ocular wave front aberrations during small amplitude changes of accommodation

L. Diaz-Santana, V. Guériaux, G. Arden, and S. Gruppetta  »View Author Affiliations

Optics Express, Vol. 15, Issue 9, pp. 5649-5663 (2007)

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We present a methodology to measure the systematic changes of aberrations induced by small changes in amplitude of accommodation. We use a method similar the one used in electrophysiology, where a periodic stimulus is presented to the eye and many periods (epochs) of the stimulus are averaged. Using this technique we have measured changes in higher order aberrations from 0.006μm to 0.02μm and correlated them with amplitude changes of accommodation as small as 0.14D. These small changes would have been undetectable without epoch averaging. The correlation coefficients of Zernike terms with defocus were calculated, demonstrating higher values of correlation for epoch averaging. The accurate monitoring of defocus at the start of the accommodation response has shown some interesting trends that may be related with the mechanisms behind accommodation.

© 2007 Optical Society of America

OCIS Codes
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(330.4460) Vision, color, and visual optics : Ophthalmic optics and devices
(330.5370) Vision, color, and visual optics : Physiological optics

ToC Category:
Vision and color

Original Manuscript: February 16, 2007
Revised Manuscript: March 23, 2007
Manuscript Accepted: April 9, 2007
Published: April 25, 2007

Virtual Issues
Vol. 2, Iss. 5 Virtual Journal for Biomedical Optics

L. Diaz-Santana, V. Guériaux, G. Arden, and S. Gruppetta, "New methodology to measure the dynamics of ocular wave front aberrations during small amplitude changes of accommodation," Opt. Express 15, 5649-5663 (2007)

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