Choose a tight fitting helmet to help reduce light reflection into the helmet through the space between the shell and the head.Wear the helmet correctly. Do not use it as a hand shield.Protect the shade lens from impact and sudden temperature changes that could cause it to crack.Use a cover lens to protect the filter shade lens. Replace the cover lens if it gets scratched or hazy.Make sure to replace the gasket periodically if your helmet uses one.Replace the clear retaining lens to protect your eyes from broken pieces.Clean lenses periodically.Discard pitted, cracked or damaged lenses.