What type of lenses must safety glasses have?

Safety glasses are specifically designed to protect the eyes from various hazards encountered in both occupational and recreational environments. The primary function of safety glasses is to provide a barrier against flying debris, chemical splashes, and other harmful elements. Impact-resistant lenses are essential as they are crafted to withstand significant force without breaking, thereby providing superior protection to the eyes.

The materials used in impact-resistant lenses, such as polycarbonate, are not only lighter than traditional glass but also offer a higher level of safety against impacts. This characteristic is crucial in settings where there is a risk of objects striking the face, ensuring that the lenses remain intact and safe for the wearer.

While options like anti-fog, regular plastic, and tinted lenses may have their own benefits in different contexts, they do not meet the primary safety requirement of impact resistance, rendering them unsuitable for safety glasses.