When should cracked or pitted lenses not be used during welding activities?

The use of cracked or pitted lenses during welding activities is always unsafe and should be avoided. The primary purpose of welding helmets and goggles is to protect the welder's eyes from both the bright light produced during the welding process and from harmful UV and IR radiation. Cracks and pits can compromise this protective function, allowing harmful light and debris to reach the eyes, which can lead to serious injury, including permanent vision damage.

Regardless of the conditions or the size of the job—whether it's sunny outside, involves heavy machinery, or is a small task—safety should always be the top priority. Using lenses that are in good condition is essential to ensure proper protection, making it vital to replace any damaged lenses before starting any welding tasks. This proactive approach aligns with best safety practices and the guidance provided in safety regulations like those from the U.S. Army Corps of Engineers (USACE) EM 385-1-1.