“…Moreover, epithelial cells of the cornea express nonclassical MHC class I molecules such as HLA-G [ 27 ], which constitutes the mechanism of immune response evasion and inhibition towards effector T cells and NK cells [ 28 ]. Many structures of the eye, including cornea, express the following immunomodulatory molecules: FasL [ 29 , 30 ], PD-L1 [ 31 ], GITRL [ 32 ], ICOSL [ 33 ], galectin-9 (Gal-9) [ 34 ], B7-H3 [ 3 ], CTLA-2 α [ 35 , 36 ], and membrane-bound complement regulatory proteins (CD59, CD55, and CD46) [ 22 ] ( Table 1 ).…”