Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/8810
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dc.contributor.authorMarcos, Susana-
dc.contributor.authorBurns, Stephen A.-
dc.contributor.authorHe, Ji Chang-
dc.date.accessioned2008-11-26T09:51:49Z-
dc.date.available2008-11-26T09:51:49Z-
dc.date.issued1998-08-
dc.identifier.citationJournal of the Optical Society of America A 15(8): 2012-2022 (1998)en_US
dc.identifier.issn1084-7529-
dc.identifier.urihttp://hdl.handle.net/10261/8810-
dc.description11 pages, 12 figures.-- OCIS codes: 330.150, 330.190, 330.200, 330.4300, 330.5310, 330.5370, 110.0110, 290.0290.-- PMID: 9691485 [PubMed].en_US
dc.description.abstractReflectrometric measurements provide an objective assessment of the directionality of the photoreceptors in the human retina. Measurements are obtained by imaging the distribution at the pupil plane of light reflected off the human fundus in a bleached condition. We propose that scattering as well as waveguides must be included in a model of the intensity distribution at the pupil plane. For scattering, the cone-photoreceptor array is treated as a random rough surface, characterized by the correlation length T (related to the distance between scatterers, i.e., mean cone spacing) and the roughness standard deviation σ (assuming random length variations of the cone outer-segment lengths that produce random phase differences). For realistic values of T and σ we can use the Kirchhoff approximation for computing the scattering distribution. The scattered component of the distribution can be fitted to a Gaussian function whose width depends only on T and λ. Actual measurements vary with experimental conditions (exposure time, retinal eccentricity, and λ) in a manner consistent with the scattering model. However, photoreceptor directionality must be included in the model to explain the actual location of the peak of the intensity distribution in the pupil plane and the total angular spread of light.en_US
dc.description.sponsorshipThis work was supported by the National Institutes of Health grant EY-04395, the Chartrand Foundation, and the Massachusetts Lions Eye Research Foundation. In addition, S. Marcos was supported by a MEC/Fulbright Postdoctoral Fellowship, Ministerio de Educación y Cultura, Spain, and J. C. He by National Research Service Award grant EY-06629.en_US
dc.format.extent3326949 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoengen_US
dc.publisherOptical Society of Americaen_US
dc.rightsclosedAccessen_US
dc.subject[OCIS] Imaging systems: Imaging systemsen_US
dc.subject[OCIS] Scattering: Scatteringen_US
dc.subject[OCIS] Vision, color, and visual optics: Vision system - noninvasive assessmenten_US
dc.subject[OCIS] Vision, color, and visual optics: Vision - photoreceptorsen_US
dc.subject[OCIS] Vision, color, and visual optics: Physiological opticsen_US
dc.titleModel for cone directionality reflectometric measurements based on scatteringen_US
dc.typeartículoen_US
dc.identifier.doi10.1364/JOSAA.15.002012-
dc.description.peerreviewedPeer revieweden_US
dc.relation.publisherversionhttp://dx.doi.org/10.1364/JOSAA.15.002012en_US
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.fulltextNo Fulltext-
item.grantfulltextnone-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
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