Anti-glare is a thin layer of metal applied to the lens that prevents light rays being reflected, thus reducing glare and enhancing viewing in bright conditions. Along with the lense diameter, it affects the amount of light that penetrates the optics of the binoculars.
Antiglare is divided into subcategories as follows:
FC (FullyCoated) - A simple anti-reflective coating
MC (Multi Coated) - features several layers (up to 7)
FMC or SMC, i.e. Super (full) MultiCoated - features multiple layers (over 7) including additives