Equivalent power of the crystalline lens of the human eye: comparison of methods of calculation

Smith, George & Atchison, David A. (1997) Equivalent power of the crystalline lens of the human eye: comparison of methods of calculation. Journal of the Optical Society of America A: Optics and Image Science, 14(10), pp. 2537-2546.


We present four methods, with different levels of sophistication and precision, for calculating the refractive power of the ocular lens from its optical structure. The first method uses finite ray tracing but simulates a paraxial ray by using small ray heights. The second method involves a recursive paraxial ray-tracing procedure. The other two methods do not depend on any ray-tracing procedure but use much simpler, approximate equations. In the third method the ray height is assumed not to change within the lens, and in the fourth method the ray path is assumed to be parabolic. The fourth method, but not the third method, can separately calculate the power of the surfaces and the gradient-index lens bulk, which are then used in the three-lens equation to calculate the power of the lens as a whole.

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15 citations in Scopus
13 citations in Web of Science®
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ID Code: 5119
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: d.atchison@qut.edu.au
Additional URLs:
Keywords: eye, gradient index, power, slab lens
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 1997 Optical Society of America
Copyright Statement: This paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/abstract.cfm?URI=josaa-14-10-2537]. 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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