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FAQs on Eye Protection

             Definitions, Hazards &  Selection


                                                                           Optical radiation – Sources



                                                                    Sunlight  Radiation   Ultraviolet   Infrared
                                                                            from heat  rays  rays
                Hazards and their Effects:
                                                                  Terms
                                                                  Hard Coating for preventing scratches
                                                                  It is applied to the exterior of the lens to minimize the likelihood of
                                                                  accidental scratching. This does not make the lens scratch proof, but
                                                                  helps in tremendously reducing fine hair line scratches.
                                                                  Anti Fog
                                                                  Prevent to condensation of moisture.








                                                                  Bridge
                                                                  It is the part of a frame that connects the two lenses and goes
                                                                  over the nose. The bridge can be either  decorative or simple.
                                                                  Frame
                Sources  of optical radiation                     It is the part that holds the lens. Frame can be made of plastic or
                   Sunlight                                       memory retention nylon.
                                                                                              Do no break
                   Radiation from heat                                                       even excess of
                   Ultraviolet rays                                                            150 m/sec

                Types of materials for lens
                Glass              Plastic           Polycarbonate               Breakage
                                                                                occurred at
                                                                                 60 m/sec
                                                                       Breakage
                                                                      occurred at
                                                                       26 m/sec



                                                                        Glass              Plastic             Polycarbonate

                                                                        Types of materials & Breakage test
                            Common Eye hazards?

                                                                             Polycarbonate Advantage


                                                                       Alternative   High impact   Clear
                      IMPACT
                                                                        for glass    resistance
                   CHEMICAL                   DUST                            Polycarbonate

                                   HEAT                               Light weight              Scratch resistant
                                                                                                with protective
                                                                                                   coating







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