Mechanism of compensation of aberrations in the human eye
JOSA A, Vol. 24, Issue 10, pp. 3274-3283 (2007)
http://dx.doi.org/10.1364/JOSAA.24.003274
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Abstract
We studied the mechanism of compensation of aberrations within the young human eye by using experimental data and advanced ray-tracing modeling. Corneal and ocular aberrations along with the alignment properties (angle kappa, lens tilt, and decentration) were measured in eyes with different refractive errors. Predictions from individualized ray-tracing optical models were compared with the actual measurements. Ocular spherical aberration was, in general, smaller than corneal spherical aberration without relation to refractive error. However, horizontal coma compensation was found to be significantly larger for hyperopic eyes where angle kappa tended to also be larger. We propose a simple analytical model of the relationship between the corneal coma compensation effect with the field angle and corneal and crystalline shape factors. The actual shape factors corresponded approximately to the optimum shapes that automatically provide this coma compensation. We showed that the eye behaves as an aplanatic optical system, an optimized design solution rendering stable retinal image quality for different ocular geometries.
© 2007 Optical Society of America
OCIS Codes
(220.1000) Optical design and fabrication : Aberration compensation
(220.2740) Optical design and fabrication : Geometric optical design
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.4460) Vision, color, and visual optics : Ophthalmic optics and devices
ToC Category:
Vision, Color, and Visual Optics
History
Original Manuscript: April 18, 2007
Revised Manuscript: August 1, 2007
Manuscript Accepted: August 5, 2007
Published: September 20, 2007
Virtual Issues
Vol. 2, Iss. 11 Virtual Journal for Biomedical Optics
Citation
Juan Tabernero, Antonio Benito, Encarna Alcón, and Pablo Artal, "Mechanism of compensation of aberrations in the human eye," J. Opt. Soc. Am. A 24, 3274-3283 (2007)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-24-10-3274
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