Figure 2.

Schematic diagram demonstrates local factors contributing to immune privilege, factors maintaining immune privilege (green color) and risk factors (red color). Footnotes - α-MSH: α -melanocyte-stimulating hormone; ACAID: anterior chamber-associated immune deviation; APCs: antigen-presenting cells; FasL: Fas ligand; IL: interleukin; MHC: major histocompatibility complex; TGF-β: tumor growth factor-β; TNF-α: tumor necrosis factor-α; T-reg: regulatory T cells; VIP: vasoactive intestinal peptide