The curved design sits close to your face for better protection from debris.

Many of these glasses also have additional features to improve wearability for long periods. Glasses with bend-and-stay arms have a wire core that adjusts to the shape of your head behind your ears, so they won't dig in or slip off your face. Metal- and X-ray-detectable glasses have metal and chemical additives that will set off metal detectors and show up on X-ray machines if they fall into your line. They help you comply with Hazard Analysis and Critical Control Point (HACCP) programs to stop contaminated food from leaving your facility. They have blue frames, so they’re easy to spot and remove from your line. Those with blue lenses also help reduce yellow glare from artificial indoor lighting.