Final answer:
Suitable face and eye protection for resistance welding includes a welder's helmet with the correct shade of filter and protective eyewear made of materials such as polycarbonate that effectively block UV radiation.
Step-by-step explanation:
An appropriate type of face and eye protection for resistance welding is a combination of a welder's helmet equipped with a special filter to protect against the intense light and goggles or other protective eyewear that can block ultraviolet radiation (UVB light). The helmet should be capable of covering not only the face but also the eyes, and the lens should be of a shade that corresponds to the intensity of the welding process to prevent the condition known as welder's flash.
Furthermore, it is important to ensure that the protective eyewear provides full coverage, meaning that the light should not reach the eyes from the sides. Contact lenses, while they may absorb some UV radiation and provide minor protection, should not replace proper protective eyewear in welding activities due to the risk of intense thermal energy and high-energy radiation exposure.