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J Opt Soc Am A. 1992 Dec;9(12):2111-7.

Modeling the power of the aging human eye.

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Department of Optometry, University of Melbourne, Parkville, VIC, Australia.


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 to prevent the eye from becoming myopic as its lens grows are shown.

[Indexed for MEDLINE]

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