Stop the fogging of eyeglasses, face shields, masks, goggles, safety glasses, and sunglasses. C-Clear products are safe to use every day on lenses, prescription lenses, including polycarbonate and lenses with optic coatings. Note: C-Clear does not stop fogging 100% on lenses with lab treated anti-reflective ("AR") coating. It may reduce some fogging, but not as fully as untreated lenses.