| Spherical aberration of the reduced schematic eye with elliptical refracting surface. | |
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MedLine Citation:
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PMID: 9293524 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We extend the single-surface schematic-eye model of ocular chromatic aberration to account for spherical aberration of the eye. This extension is accomplished by allowing the model's single refracting surface to be a member of the family of ellipses with variable shape parameter (eccentricity). The resulting model, dubbed the "Indiana Eye," may have either positive or negative spherical aberration of varying degree, depending upon the numerical value of the shape parameter. Spherical aberration of the model eye is well described by third-order optical theory for shape parameters in the range 0 < or = p < or = 0.7, but requires fifth-order theory for an accurate description over the parametric range 0.7 < p < or = 1.0. An improved technique was devised for fitting the model to published measurements of ray aberrations while avoiding errors of estimation of the degree of spherical aberration present in eyes which also manifest odd-symmetric aberrations, such as coma. A shape parameter value of approximately p = 0.6 provided the best fit of the model to selected data from the literature. |
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Authors:
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L N Thibos; M Ye; X Zhang; A Bradley |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S.; Review |
Journal Detail:
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Title: Optometry and vision science : official publication of the American Academy of Optometry Volume: 74 ISSN: 1040-5488 ISO Abbreviation: Optom Vis Sci Publication Date: 1997 Jul |
Date Detail:
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Created Date: 1997-10-21 Completed Date: 1997-10-21 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8904931 Medline TA: Optom Vis Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 548-56 Citation Subset: IM |
Affiliation:
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School of Optometry, Indiana University, Bloomington, USA. thibos@indiana.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Eye* Humans Mathematics Models, Theoretical Refraction, Ocular / physiology* Refractive Errors / physiopathology Vision, Ocular / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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R01 EY05109/EY/NEI NIH HHS |
| Comments/Corrections | |
Comment In:
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Optom Vis Sci. 1998 Apr;75(4):247-8
[PMID:
9586748
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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