The filter lenses required for eye protection during welding are designed to safeguard from which of the following?

Welding produces intense light and heat, which can emit harmful rays that pose risks to the eyes. Filter lenses for welding are specifically engineered to protect against ultraviolet (UV) rays, which are emitted during the welding process. UV rays can lead to serious conditions like photokeratitis or "welder's flash," causing pain and temporary vision impairment.

While there are various forms of radiation involved in welding, the primary concern for eye safety during welding is the UV radiation due to its ability to cause damage quickly and with relatively short exposure. Filter lenses are designed to absorb or block these rays effectively while allowing the welder to see the work clearly without the risk of eye injury.

In contrast, while infrared rays, visible light, and X-rays can also pose hazards in different contexts or forms of welding, the key protective feature of welding filter lenses is primarily their ability to shield against the potentially damaging effects of UV rays.