Glasses​,​ also known as eyeglasses or spectacles​,​ are vision eyewear​,​ consisting of glass or hard plastic lenses mounted in a frame that holds them in front of a person's eyes​,​ typically utilizing a bridge over the nose and hinged arms (known as temples or temple pieces) which rest over the ears. Glasses are typically used for vision correction​,​ such as with reading glasses and glasses used for nearsightedness​,​ however​,​ without the specialized lenses​,​ they are sometimes used for cosmetic purposes. Safety glasses provide eye protection against flying debris for construction workers or lab technicians; these glasses may have protection for the sides of the eyes as well as in the lenses. Some types of safety glasses are used to protect against visible and near-visible light or radiation. Glasses are worn for eye protection in some sports​,​ such as squash. Glasses wearers may use a strap to prevent the glasses from falling off. Wearers of glasses that are used only part of the time may ha