Abstract
We present evidence for the wavelength dependence of the directionality of light reflected from cone receptor cells (optical Stiles–Crawford effect): Blue light is more directional than red. According to the waveguide-scattering model of Marcos et al. [J. Opt. Soc. Am. A 15, 2012 (1998)], directionality is the sum of a waveguide component and a scattering component. The latter is proportional to 1 over wavelength squared, and it is related to the row-to-row spacing of the cone lattice. Our results allow a firm confirmation of Marcos et al.’s theory. For a 1.9-deg foveal area, group mean cone spacing was 3.42 µm, in good agreement with anatomical data. Group mean waveguide directionality was 0.077
© 2003 Optical Society of America
Full Article | PDF ArticleMore Like This
Susana Marcos and Stephen A. Burns
J. Opt. Soc. Am. A 16(5) 995-1004 (1999)
Susana Marcos, Stephen A. Burns, and Ji Chang He
J. Opt. Soc. Am. A 15(8) 2012-2022 (1998)
J. C. He, S. Marcos, and S. A. Burns
J. Opt. Soc. Am. A 16(10) 2363-2369 (1999)