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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 1 — Jan. 3, 2011

Nested shell optical model of the lens of the human eye

Charles E. Campbell  »View Author Affiliations


JOSA A, Vol. 27, Issue 11, pp. 2432-2441 (2010)
http://dx.doi.org/10.1364/JOSAA.27.002432


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Abstract

A nested shell model of the human lens is developed based on the known anatomical construction of the lens, on the known way in which the lens grows throughout its life, on the measured characteristics of the lens surfaces as a function of the age of the lens, on the measured changes in the shape of the lens during accommodation, and on measured material characteristics of the lens materials, such as density and index of refraction throughout. The observed changes in central surface curvature and thickness force the shell thicknesses to vary in a predicable way and in turn force the shell surface asphericity to take certain values. Thus, in addition to giving the shape of each shell, the model predicts the change expected in the asphericity of the lens surfaces as the lens ages and adds cortical cell layers. Two examples are given, one for a 25-year-old lens and one for a 40-year-old lens, to show how the cortical layers change their shapes throughout the cortex and over time as the lens ages. The performance of the model of this paper is compared to that of two other nested shell models, one where the layers have constant thickness and one where the lens posterior is fixed within the eye over time, to show the superior performance of this model with respect to maintaining a constant refractive error for the eye as the lens ages and grows.

© 2010 Optical Society of America

OCIS Codes
(110.2760) Imaging systems : Gradient-index lenses
(170.4460) Medical optics and biotechnology : Ophthalmic optics and devices
(330.5370) Vision, color, and visual optics : Physiological optics
(330.7323) Vision, color, and visual optics : Visual optics, aging changes
(330.7326) Vision, color, and visual optics : Visual optics, modeling

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: April 27, 2010
Revised Manuscript: August 25, 2010
Manuscript Accepted: September 10, 2010
Published: October 20, 2010

Virtual Issues
Vol. 6, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Charles E. Campbell, "Nested shell optical model of the lens of the human eye," J. Opt. Soc. Am. A 27, 2432-2441 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-27-11-2432

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