Which is the first line of defense for the eyes?

Safety glasses or goggles serve as the first line of defense for the eyes primarily because they are specifically designed to protect against a variety of hazards. These include physical impacts, chemical splashes, and other airborne particles that can cause injury to the eyes. The protective features of safety glasses or goggles ensure a secure fit that covers the eyes properly, providing a barrier against external threats.

In contrast, contact lenses can shield the eyes from slight dust and debris but lack the robust protection necessary for more hazardous environments. Regular glasses, while beneficial in correcting vision, do not offer adequate protection from impacts or chemical exposures. A face shield provides broad protection for the entire face, including the eyes, but it is generally used in conjunction with other protective equipment rather than as a standalone first line of defense. This makes safety glasses or goggles the most effective and appropriate choice for eye protection in a variety of situations.