title: Response for light scattered in the ocular fundus from double-pass and Hartmann-Shack estimations.
abstract: Double-pass (DP) and Hartmann-Shack (HS) are complementary techniques based on reflections of light in the ocular fundus that may be used to estimate the optical properties of the human eye. Under conventional data processing, both of these assessment modes provide information on aberrations. In addition, DP data contain the effects of scattering. In the ocular fundus, this phenomenon may arise from the interaction of light with not only the retina, but also deeper layers up to which certain wavelengths may penetrate. In this work, we estimate the response of the ocular fundus to incident light by fitting the deviations between DP and HS estimations using an exponential model. In measurements with negligible intraocular scattering, such differences may be related to the lateral spreading of light that occurs in the ocular fundus due to the diffusive properties of the media at the working wavelength. The proposed model was applied in young healthy eyes to evaluate the performance of scattering in such a population. Besides giving a parameter with information on the ocular fundus, the model contributes to the understanding of the differences between DP and HS estimations.
authors.forename: Carlos E
authors.initials: CE
authors.lastname: García-Guerra
authors.forename: Mikel
authors.initials: M
authors.lastname: Aldaba
authors.forename: Montserrat
authors.initials: M
authors.lastname: Arjona
authors.forename: Fernando
authors.initials: F
authors.lastname: Díaz-Doutón
authors.forename: Joan A
authors.initials: JA
authors.lastname: Martínez-Roda
authors.forename: Jaume
authors.initials: J
authors.lastname: Pujol
mesh_terms: D000328:Adult; D005654:Fundus Oculi; D006801:Humans; D008027:Light; D008954:Models, Biological; D057054:Molecular Imaging; D012542:Scattering, Radiation