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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 26, Iss. 8 — Aug. 1, 2009
  • pp: 1847–1854

Macular pigment density assessed by directional fundus reflectance

Jean-Marie Gorrand, Michel Doly, and Franck Bacin  »View Author Affiliations


JOSA A, Vol. 26, Issue 8, pp. 1847-1854 (2009)
http://dx.doi.org/10.1364/JOSAA.26.001847


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Abstract

Light radiated from foveal photoreceptors was analyzed in the eye’s pupil at 470 nm and 532 nm . The reflectance of the inner limiting membrane was then measured at 6 deg from the fovea for the same wavelengths, allowing us to determine the macular pigment (MP) density D dir using the directional reflectance technique. In addition we measured the MP density D nd using the nondirectional reflectance technique (26 subjects). The mean values of D dir and D nd were 0.419 ± 0.097 and 0.195 ± 0.042 D.U. , respectively (sample field of 2 deg ). They were highly correlated ( p < 0.0001 ) . Comparison of D dir and D nd implies that 57 ± 12 % of the light reflected from the fovea comes from layers anterior to MP at 470 nm . The mean directionality factors ρ that we have measured at 470 nm and 532 nm were equal to 0.239 ± 0.028 and 0.210 ± 0.028 mm 2 , respectively. They were correlated ( p < 0.0001 ) and followed the spectral dependence suggested by Marcos.

© 2009 Optical Society of America

OCIS Codes
(330.7326) Vision, color, and visual optics : Visual optics, modeling
(330.7331) Vision, color, and visual optics : Visual optics, receptor optics

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: December 5, 2008
Revised Manuscript: April 25, 2009
Manuscript Accepted: June 16, 2009
Published: July 29, 2009

Virtual Issues
Vol. 4, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Jean-Marie Gorrand, Michel Doly, and Franck Bacin, "Macular pigment density assessed by directional fundus reflectance," J. Opt. Soc. Am. A 26, 1847-1854 (2009)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-8-1847


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