Fig. 3From: Distribution of polymeric nanoparticles in the eye: implications in ocular disease therapyBlood-retinal barrier [65]. Permission to reproduce this figure is granted under the Creative Commons Attribution License. Figure 3 is reprinted from Frontiers in Immunology, Forrester V & Xu H, Good news–bad news: the Yin and Yang of immune privilege in the eye, 2012, under the Creative Commons Attribution LicenseBack to article page