Determination of chromatic aberration in the human eye by means of Fresnel propagation theory

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Título: Determination of chromatic aberration in the human eye by means of Fresnel propagation theory
Autor/es: Mas, David | Pérez Rodríguez, Jorge | Illueca Contri, Carlos | Espinosa, Julián | Hernández Poveda, Consuelo | Vázquez Ferri, Carmen | Miret, Juan Jose
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
Palabras clave: Physiological optics | Beam propagation | Chromatic aberrations
Área/s de conocimiento: Óptica
Fecha de creación: 2005
Fecha de publicación: 23-sep-2005
Editor: SPIE, The International Society for Optical Engineering
Cita bibliográfica: MAS CANDELA, David, et al. “Determination of chromatic aberration in the human eye by means of Fresnel propagation theory”. En: Medical Imaging / edited by Andrzej Kowalczyk, Adolf F. Fercher, Valery V. Tuchin. Bellingham, Wash. : SPIE, 2005. (Proceedings of SPIE; Vol. 5959). ISSN 1605-7422
Resumen: In this communication, the authors have determined the longitudinal chromatic aberrations in real eyes. The method that has been used combines real data of corneal morphology, central thickness of crystalline lens and biometric measures of axial length together with numerical calculation of the propagation process. The curvature of the crystalline lens has been adjusted to different curvature models and refractive index distributions. The wavelength dependence of all ocular media has been modelled through the Cauchy formula. Propagation through anterior and posterior chambers has been accomplished through numerical calculation of diffraction integral instead of classical ray-tracing approach. This imposes serous restrictions on the number of samples that are needed for a full propagation process. If we are only interested in amplitude calculations the method consists of evaluating propagation from cornea to crystalline lens with a spectrum propagation method. Propagation from the lens to the best image plane is accomplished by a direct calculation of Fresnel integral. With this model, we have obtained the refraction chromatic difference in diopters for several eyes. Results are compared with real measures of the chromatic aberration, showing a good agreement with numerical calculations. The capabilities of the technique have been demonstrated by applying the method to the study of the chromatic aberration of a keratoconus.
Patrocinador/es: This work has been partially supported by the Conselleria de Cultura, Educació i Esport of the Generalitat Valenciana, through the project nr. GV04A/578.
ISSN: 1605-7422
DOI: 10.1117/12.624374
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: Copyright 2005 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 5959, 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.
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