Protective glasses, also called safety glasses are used for protecting people who often work in the dangerous environment. For example, peole who are in the workshop can benefit from safety glasses because they can protect their eyes from some particles getting into eyes. Or they can protect people who have sentitive eyes when they work in the special environment.
As the name implies, protective glasses are worn for eye protection. in fact, protective glasses can also be understand as safety glasses or sports sunglasses. Compared with regular glasses, the devices not only provide vision correction, but also shield eyes in some environment. For example, for people who swimming, there are swimming glasses that protect their eyes from waters thus to avoid bacterial infection to eyes.