The diattenuation spectrum of the retinal nerve fiber layer (RNFL) reflectance has been predicted to depend strongly on the relative refractive index (<i>m</i>) of light-scattering cylinders. To constrain the values of <i>m</i>, diattenuation of the RNFL reflectance of isolated rat retina was measured with a multispectral imaging micropolarimeter. The RNFL reflection has very weak intrinsic diattenuation at all wavelengths (400–830 nm), which rejects all values of <i>m</i> ≥ 1.03. Degree of polarization (DOP) for reflection from the RNFL was also measured. DOP was close to unity at all wavelengths, which indicates that the RNFL is a polarization-preserving reflector.
© 2003 Optical Society of America
Xiang-Run Huang and Robert W. Knighton, "Diattenuation and Polarization Preservation of Retinal Nerve Fiber Layer Reflectance," Appl. Opt. 42, 5737-5743 (2003)