Safety glasses and goggles will protect the eyes from minor chemical splashes and, with attached side shields, will also protect the eyes from dust and flying objects. Some come with prescription lenses or bifocal lenses, but others can fit over prescription glasses, as well. For increased durability, the lenses will be made from polycarbonate, scratch-resistant material. Some lenses are also coated with Ultradura for additional chemical resistance. Instead of a side shield, some chemical safety glasses might have a wraparound style or, for outdoor use, could have an amber, brown, or blue tint.