Corneal primary aberrations compensation by oblique light incidence
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Título: | Corneal primary aberrations compensation by oblique light incidence |
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Autor/es: | Espinosa, Julián | Mas, David | Kasprzak, Henryk T. |
Grupo/s de investigación o GITE: | Óptica y Ciencias de la Visión |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía | Wroclaw University of Technology. Institute of Physics |
Palabras clave: | Astigmatism | Angle kappa | Ocular aberrations |
Área/s de conocimiento: | Óptica |
Fecha de creación: | 2009 |
Fecha de publicación: | jul-2009 |
Editor: | SPIE, The International Society for Optical Engineering |
Cita bibliográfica: | ESPINOSA TOMÁS, Julián; MAS CANDELA, David; KASPRZAK, Henryk T. “Corneal primary aberrations compensation by oblique light incidence”. Journal of Biomedical Optics. Vol. 14, Issue 4 (July-Aug. 2009). ISSN 1083-3668, pp. 044003-1/6 |
Resumen: | The eye is not a centered system. The line of sight connects the fovea with the center of the pupil and is usually tilted in the temporal direction. Thus, off-axis optical aberrations, mainly coma and oblique astigmatism, are introduced at the fovea. Tabernero et al. [J. Opt. Soc. Am. A 24(10) 3274–3283 (2007)] showed that a horizontal tilt of the crystalline lens generates a horizontal coma aberration that is compensated by the oblique light incidence on the eye. Here we suggest that corneal astigmatism may also play a role in compensation of oblique aberrations, and we propose a simple model to analyze such a possibility. A theoretical Kooijman eye model with a slight (~0.6 D) with-the-rule astigmatism is analyzed. Light rays at different incidence angles to the optical axis are considered, and the corresponding point spread functions (PSFs) at the retina are calculated. A quality criterion is used to determine the incidence angle that provides the narrowest and highest PSF energy peak. We show that the best image is obtained for a tilted incidence angle compatible with mean values of the angle kappa. This suggests that angle kappa, lens tilt, and corneal astigmatism may combine to provide a passive compensation mechanism to minimize aberrations on the fovea. |
Patrocinador/es: | David Mas acknowledges the support of the Generalitat Valenciana through the project BEST-2008-148. Henryk T. Kasprzak acknowledges the University of Alicante for its financial support through the project Senior 08/07. |
URI: | http://hdl.handle.net/10045/11472 |
ISSN: | 1083-3668 (Print) | 1560-2281 (Online) |
DOI: | 10.1117/1.3158996 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | Copyright 2009 Society of Photo-Optical Instrumentation Engineers (SPIE). This paper was published in Journal of Biomedical Optics 14(4), 044003 (July/August 2009), and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1117/1.3158996 |
Aparece en las colecciones: | INV - IMAOS+V - Artículos de Revistas |
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