The thickness of the lens is divided into: ordinary, ultra-thin, ultra-thin; Can be fond of according to individual, general thin lens, the price can be a few taller relatively. There's nothing to be fussed about. General Men's Rectangle Glasses lens discoloration, it can be inferred that the lens is anti-radiation, not discoloration is not anti-radiation, it is recommended to choose can change the lens.
Rounded Rectangle Glasses Lenses can be divided into spherical and aspherical lenses according to how objects look. Aspheres see objects more clearly, do not deform, and prevent further deepening. Spherical is to see the object only a plane, squint around, see the scenery may be a little deformed, there is no three-dimensional sense. Resin Cat Eye Black Frame Glasses lenses, which are of good quality and relatively inexpensive, are widely used. But its disadvantage is that it is easy to scratch, and there is no way to repair the scratch, so remember to put it in the Cat Eye Frame Glasses case when it is not used, so that it can increase its service life. A resin lens will normally last two years, but longer if it is well protected.
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