Complete algorithm for the calculation light patterns inside the ocular media

Abstract

Realistic mathematical models are of great importance for studying the optical performance of the human eye. Light propagation algorithms provide robust methods to calculate field distributions inside a homogeneous medium, and thus they can be applied to the study of light patterns inside the anterior and posterior chambers of the eye. Dealing with real eyes implies using very short propagation distances together with highly refractive power surfaces. Thus, the general solutions of the field equation are used instead of paraxial Fresnel solutions. Conditions of application and sampling conditions of the method are clearly stated here. Numerical evaluation of the different refractive surfaces is also analysed. The main result is that a complete algorithm to obtain light patterns at any axial distance inside the eye is proposed. The method uses real corneal measures and axial distances together with crystalline models. Statistical results and individual predictions show the validity of the model. Application of the method is illustrated with the study of a bifocal intraocular lens.

Fresnel-based analysis of Kasprzak's crystalline model: statistical results and individual predictions

“…Thus, the method is valid up to a certain distance from the theoretical focus [21]. In [22] the authors make a complete analysis of the method, and we established that correct sampling of light patterns at any distance in the eye is accomplished while the number of samples NX4096:…”

Scale corrections for faster evaluation of convergent Fresnel patterns

“…As we stated before, one of the motivations of this work is the study of light propagation through the human eye [12,13]. Analysis of image formation in the human eye consists in studying not only the convergence of the beam but also the whole structure of the wavefront through aberration polynomials.…”

Propagation and phase reconstruction of ocular wavefronts with SAR techniques

“…"Special Issue in Physiological Optics" Propagation implies working with convergent light patterns, so we have used an algorithm previously developed by us [10].…”

“…Light pattern in any plane inside the second chamber of the eye is calculated through angular spectrum propagation [9,10]. We obtain the ( , ) W x y function by extracting the wavefront of the field at the exit plane of the crystalline lens.…”