A good metal optical frame with a pair of ordinary lenses, will not affect the optical performance of the lens, will not cause any harm to our eyes. However, if a good pair of lenses is not carried on an accurate metal optical frames, not only can it not play its normal optical performance, the free change of the optical center point will cause damage to our vision.The metal optical frames are lighter than the acetate frames, and it is not easy to produce a sense of pressure. As a metal optical frames suppliers, our metal optical materials are nickel silver, stainless steel, Monel etc... These materials processed through precision processing, plated with gold, silver, or popular painting colors finish.