Crystal lenses are no longer the first choice, new material PC lenses are about to enter the market most of the modern people have dealt with Polarized Glasses, whether they have vision problems or not. As anyone who has worn Cheap Prescription Glasses knows, the following factors are key to choosing Clear Eyeglasses. Comfortable: that is, comfortable to look at, which is determined by the optical quality of the lens, but also comfortable to wear, light material. Beautiful: thin, flat, no reflection, Transparent Eyeglasses can dye. Safety: refers to optical safety and mechanical safety. Durability: wear resistance, impact resistance. The above requirements are related to the material, optical design and surface treatment of the lens. Among them, the choice of material can directly determine the lens base bend and shape, light transmittance, refractive index, impact resistance, cut ultraviolet ray and dispersion index (Abbe number).
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