Anti-fog films, layers, lenses, and inserts for use in eyewear and protective eye gear, namely, goggles, glasses, lenses, shields, face shields, face masks, safety goggles, protective visors, sports goggles, sports visors, helmet visors, eye shields, protective headgear visors, wind shields, and inserts; anti-fog optical devices, namely, protective goggles, glasses, lenses, films, shields, face shields, face masks, safety goggles, protective visors, sports goggles, sports visors, helmet visors, eye shields, protective headgear visors, wind shields, tinted or tintable inserts, variable light transmittance inserts and inserts featuring liquid crystals that attach to eyewear, protective eye gear, eye shields and visors mounted to helmets; anti-fog optical inserts for use with eyewear and protective eye gear, namely, goggles, glasses, lenses, shields, face shields, face masks, safety goggles, protective visors, sports goggles, sports visors, helmet visors, eye shields, protective headgear visors, and wind shields