What is the primary reason for wearing safety glasses when using a vise?

The primary reason for wearing safety glasses when using a vise is that the clamping force can indeed exert significant pressure on the workpieces, potentially causing them to break. When parts break or come loose due to high force or improper placement in the vise, sharp fragments or debris can be ejected at high speeds. Safety glasses are crucial because they provide a protective barrier for the eyes against these flying debris pieces, which could cause serious eye injuries.

While preventing dust and debris, avoiding glare, and ensuring compliance with safety regulations are all valid considerations in a workshop environment, the immediate danger posed by flying parts when using a vise highlights the importance of protecting the eyes from sudden impacts. This underscores the necessity of wearing safety glasses as a fundamental aspect of safety in potential high-risk situations involving clamping and machining.