Presbyopic glasses and glass lens resin lens which is better?
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.Disadvantages of glass: fragile, heavier than resin, and if you are not 300 degrees high, then glass and resin can be selected. 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.
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.
Million super glasses customer service told me that if your degree of six Baidu above, in fact, you can still choose resin lenses, but to choose high refractive index lenses, so that the eye will be thinner than the average resin film. But the price is a little bit higher. The glass is only available in full frame, and the weight will be a little heavier.
