Safety eye shields are used to provide an expert protection for eyes. They vary according different intended uses. There can be operating spectacles used in hospital, welding glasses used when the wearer embarking on welding, lasering protective eyeglasses used in laser engraving and so on so forth. They are so well targeted that they have another name as professional glasses which indicates that they can be applied in various industrial production. They mainly function to prevent eyes and faces from harm from ultraviolet radiation, infrared ray, microwave and some other electromagnetic radiations, as well as dust, smoke dust sweepings and chemical solution, etc.. Here below are some detailed information concerning their categories.
Professional glasses warding off solid fragments. They are mainly used to prevent sweepings and chippings of metals and sandstones to mechanically damage eyes. Both the lenses and frames are supposed to be sturdy in construction, so that they are impact-resistant. Coverings are needed to get equipped around the frame and there should be vents. They lenses can be made from heat-rested glass, colloid bonded glass or copper wire gauze.
Professional glasses warding off chemical solutions. They are mainly used to prevent irritative or corrosive solution to chemically injury eyes. The lenses can be non prescribed and made from ordinary materials, but there should also be coverings equipped around the frame in case of solution splashing into eyes. They are usually needed in diverse laboratories and hospitals, etc..
Professional glasses warding off radiations. They are mainly used to prevent harmful rays, like UV, to harm eyes. The lenses are made from special glass which are of permeability of visible light, and at the same time reflect or absorb harmful rays. Therefore, chrome, nickel, hydrargyrum or silver is supposed to be coated on the lenses. Usually, blue lenses are able to absorb infrared rays; yellow green lenses to absorb both ultraviolet radiation and infrared rays; clear leady lenses to absorb X and Y rays.
Professional glasses warding off dust. Normally, there are no specific requirements on the lenses and frames for those eyeglasses, but the lenses should be of high permeability of visible light, so that even in dusty environment, the wearers are able to see objects in vision more easily and coverings around the frame are also needed so that dust can be blocked outside.