What defines a prescription lens according to the safety regulations?

A prescription lens is defined as one that is specifically used while engaged in operations that require eye protection. This aligns with safety regulations that emphasize the necessity of proper eye protection measures in environments where there are risks of eye injury. Prescription lenses serve not only to correct vision but also to ensure that individuals can safely perform tasks that have potential hazards to their eyes.

In contexts such as construction, manufacturing, or laboratory work, using prescription lenses compliant with safety standards ensures that workers can see clearly while also protecting their eyes from debris, chemical splashes, or other dangers. This definition highlights the dual purpose of these lenses—correcting vision and providing required safety measures, thereby minimizing the risk of accidents and injuries in the workplace. The emphasis on their use in protective situations makes them crucial for compliance with regulations and overall workplace safety.