Modeling the power of the aging human eye

Smith, George, Atchison, David A., & Pierscionek, Barbara K. (1992) Modeling the power of the aging human eye. Journal of the Optical Society of America A: Optics and Image Science, 9(12), pp. 2111-2117.


A hypothesis is presented that may explain why the aging eye does not become myopic with age. The power of the eye lens is predicted with a modeling approach to determine how the form of the refractive-index gradient within the lens can change to maintain a constant power in spite of age-related curvature increase. Methods used include published age-dependent data on the optical parameters of the eye, a mathematical model of the lens based on elliptical isoindicial contours, and a refractive-index profile that can be expressed as a power series in the distance from the lens center. The kinds of change in profile required the eye from becoming myopic as its lens grows are shown.

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103 citations in Scopus
97 citations in Web of Science®
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ID Code: 5089
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal's website (see link) or contact the author. Author contact details:
Additional URLs:
Keywords: human, eye, power, myopia, refractive, index gradient
ISSN: 1520-8532
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 1992 Optical Society of America
Copyright Statement: This paper can be found at the following URL on the OSA website: []. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Deposited On: 27 Sep 2006 00:00
Last Modified: 15 Jan 2009 07:12

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