We have developed a method for calculating the optical diffuse reflection coefficient for the ocular fundus, taking into account multiple scattering of light in its layers (retina, epithelium, choroid) and multiple refl ection of light between layers. The method is based on the formulas for optical “combination” of the layers of the medium, in which the optical parameters of the layers (absorption and scattering coefficients) are replaced by some effective values, different for cases of directional and diffuse illumination of the layer. Coefficients relating the effective optical parameters of the layers and the actual values were established based on the results of a Monte Carlo numerical simulation of radiation transport in the medium. We estimate the uncertainties in retrieval of the structural and morphological parameters for the fundus from its diffuse reflectance spectrum using our method. We show that the simulated spectra correspond to the experimental data and that the estimates of the fundus parameters obtained as a result of solving the inverse problem are reasonable.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 83, No. 3, pp. 419–429, May–June, 2016.
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Lisenko, S.A., Kugeiko, M.M. Method for Calculating the Optical Diffuse Reflection Coefficient for the Ocular Fundus. J Appl Spectrosc 83, 412–421 (2016). https://doi.org/10.1007/s10812-016-0303-4
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DOI: https://doi.org/10.1007/s10812-016-0303-4