Toughened Lenses - Impact Resistant , 12x Scratch Resistance, Enhanced Clarity By 4%

Toughened lenses are impact resistance lenses. Normal glass lenses are processed to rearrange their molecular structure to withstand higher impact. Toughening increases the clarity of the lenses by 3-4% and surface becomes 12 times more scratch resistant. Toughening does not change the power of prescription lenses, their shapes or color. TOUGHENED LENSES can be tested for toughness by DROP BALL TEST based on the most rigid impact test for toughened lenses in the world; American federal standard Z 87-1/1984 i.e., 1" steel ball weighing 70 gms. be freely dropped from the height of 50" on the outer surface of the lenses. Our spectacles type safety goggles with toughened lenses are ideal for operations like grinding, buffing, polishing, furnace and foundry observation, machining, chipping, welding, chemical handling.