Are glasses good for glass or good for resins?
The advantages of glass: light transmittance is better, can reach more than 99%, high density, the same degree of lens than the resin sheet much thinner lenses used for a long time is not easy to yellowing, long service life, cheap, high hardness, should not wear flowers.Glass defects: fragile, heavier than resin pieces, if the degree is not high about 300 degrees, then the glass and resin pieces are optional.
Two each have advantages and disadvantages, resin weight than the glass light, not easily broken, but not as good as the glass eye candy, afraid of grinding, now resin material has also improved, such as high density resin lens model, to solve the original problem of polarized light refraction, the density is not enough, there is an increase in the coating to filter out harmful light, overall said resin is better than that of glass, but it is good for the resin film, street selling, as well as glass.
Only the glass will be heavier, the lenses fragile, the glass can not do frameless and half frame glasses, and can only be selected in the full box. If equipped with resin that would be a lot lighter than glass, the thickness of a bit thick.The resin lenses are not limited to frames, and are available with frameless, half frame, and full frames.If the degree of six more than Baidu, in fact, you can still choose resin lenses, but to choose high refractive index lenses, so that the eye will be thinner than the general resin. But the price is a little bit higher. The glass is only available in full frame, and the weight will be a little heavier.If more than one thousand degrees, it is with a piece of glass, because of differences in thickness with a resin sheet one thousand degrees of glass is very obvious, with a piece of glass, then choose a smaller frame frame, made out of glasses, the effect is very ideal. If the resin sheet is used, it is very thick. Resin film now accounts for more than 95% of the market, glass lenses are becoming more and more difficult to buy. Resin chips are already in the mainstream now.
Resin film advantages: light weight, not broken, impact resistance, low hardness, easy to be worn flowers.Disadvantages of resin sheet: thicker than the same degree of glass, not high temperature, small density, easy to yellow, high refractive index of the lens prices are high.
