1 March 2010 Optical surface reconstruction technique through combination of zonal and modal fitting
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J. of Biomedical Optics, 15(2), 026022 (2010). doi:10.1117/1.3394260
Abstract
Videokeratometers and Scheimpflug cameras permit accurate estimation of corneal surfaces. From height data it is possible to adjust analytical surfaces that will be later used for aberration calculation. Zernike polynomials are often used as adjusting polynomials, but they have shown to be not precise when describing highly irregular surfaces. We propose a combined zonal and modal method that allows an accurate reconstruction of corneal surfaces from height data, diminishing the influence of smooth areas over irregular zones and vice versa. The surface fitting error is decreased in the considered cases, mainly in the central region, which is more important optically. Therefore, the method can be established as an accurate resampling technique.
Julián Espinosa, David Mas, Jorge Pérez, Carlos Illueca, "Optical surface reconstruction technique through combination of zonal and modal fitting," Journal of Biomedical Optics 15(2), 026022 (1 March 2010). http://dx.doi.org/10.1117/1.3394260
Submission: Received ; Accepted
JOURNAL ARTICLE
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KEYWORDS
Zernike polynomials

Cornea

Biomedical optics

Matrices

Optical spheres

Wavefronts

Error analysis

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