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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 11, Iss. 14 — Jul. 14, 2003
  • pp: 1628–1642

Simulation of eccentric photorefraction images

Ying-Ling Chen, Bo Tan, and J. W. L. Lewis  »View Author Affiliations

Optics Express, Vol. 11, Issue 14, pp. 1628-1642 (2003)

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Photorefractive (PR) screening of children is currently used for detection of specific vision problems. We have used three-dimensional ray tracing and several published models of the human eye to investigate the ability to predict photorefractive results. Specifically, by using the optical design of an actual photorefractive instrument and using a monochromatic source as an example, we demonstrate the methodology of computing the relative spatial irradiance at its detector surface. The variation of the irradiance at the detector is computed for several eye models for a range of refractive errors. The results showed that the basic physics of photorefraction is described simply using the width and the center of the dark zone (CDZ) of retinal reflex images. Refractive parameters of a subject can be directly determined from these values of CDZ, and the contribution of monochromatic and chromatic aberrations upon the CDZ is derived.

© 2003 Optical Society of America

OCIS Codes
(170.4460) Medical optics and biotechnology : Ophthalmic optics and devices
(170.4470) Medical optics and biotechnology : Ophthalmology

ToC Category:
Research Papers

Original Manuscript: March 19, 2003
Revised Manuscript: May 19, 2003
Published: July 14, 2003

Ying-Ling Chen, Bo Tan, and J. Lewis, "Simulation of eccentric photorefraction images," Opt. Express 11, 1628-1642 (2003)

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