But don't rely on them to stop significant impact. Polycarbonate lenses, which are far more economical than glass safety lenses, scratch easily. Always wet-clean them and dry with them a soft, clean cotton cloth. Your breath makes lenses fog over, particularly when you work hard. If you're also wearing a mask, it must fit well around your nose to avoid channeling your breath toward the glasses.
Antifog coatings help, but they drive up the price and get scratched easily.
Get UV protection if you'll be working outdoors. Here's a rundown of the basic kinds of eye protection and how to choose the right one for your work. Safety Glasses Available in an increasingly wide range of styles, safety glasses have either single-piece lenses or separate lenses with detachable side shields. Many are sold as UV-blocking sunglasses. Some oversize specs are made to fit over prescription eyeglasses.