When we go from cold to hot nothing is more annoying, and sometimes dangerous, than suddenly having our glasses mist up. Especially in everyday situations: cooking, playing sports or moving from hot to cold or humid environments. An optical innovation helps us avoid this problem. By adding a hydrophilic surface layer, water and mist are repelled from the surface of the lens. This treatment can be applied to all lenses, tinted or not, and for all visual corrections.