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Proceedings Paper

Tangential and sagittal curvature from the normals computed by the null screen method in corneal topography
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Paper Abstract

A new method for computing the tangential and sagittal curvatures from the normals to a cornea is proposed. The normals are obtained through a Null Screen method from the coordinates of the drops shaped spots at the null screen, the coordinates on a reference approximating surface and the centroids on the image plane. This method assumes that the cornea has rotational symmetry and our derivations will be carried out in the meridional plane that contains the symmetry axis. Experimental results are shown for a calibration spherical surface, using cylindrical null screens with radial point arrays.

Paper Details

Date Published: 2 November 2011
PDF: 9 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80119J (2 November 2011); doi: 10.1117/12.903417
Show Author Affiliations
Amilcar Estrada-Molina, Univ. Nacional Autónoma de México (Mexico)
Rufino Díaz-Uribe, Univ. Nacional Autónoma de México (Mexico)


Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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