Many glasses friends will choose problems, it is some optometrist suggest wearing glass lenses, some Suggestions to wear resin lenses, consumers to the end
The advantages, the advantages and disadvantages of optical glass lenses: under high refractive index has lower dispersion coefficient, good hardness, easy dyeing, pervious to light and match the thin lens, uv protection, suitable for all glasses, glass lenses of refractive index of 1.
Weakness: the lens is heavy, fragile, poor impact resistance, not suitable for children, young people wearing, security is low, not suitable for half box, wu kuang frames.
Second, the advantages and disadvantages of optical resin lenses advantages: light weight.
Half the weight of glass lenses to a third.
Not easily broken: one thousand lenses were smashed, not only fragments, less and less sharp, can make eye and facial injury situation to a minimum.
Can be dyed: resin lens easy dyeing, can match with clothing, popular do moderate.
Almost completely breaking wave can interrupt the ultraviolet ray: 350 mm under ultraviolet light, the effect is better than the glass lenses.
Anti-fog strong sex: due to the resin lenses of thermal conductivity was lower than those of glass, not easily caused by steam, hot water vapor ambiguity phenomenon, even generate fuzzy also will soon subside.
Can prevent dent: general heat small volume material to cause dents in the glass and spots, but when touching the resin lens, bounce off automatically, will not cause any trace in the lens surface.
Resin lens reflex is lower than general glass surface, also is not dazzling.
Resin double piece no off color, this is due to the resin double lens is the whole structure, so the fusion glass double light piece of rare color difference.
Light transmittance as high as 92%, of resin lens is glass high above 2%.
Resin lens resistance to chemicals and solvents, almost all families with solvents and chemicals on it won't be affect or damage.
Disadvantages: easy to scratch: scraping resistance of resin lens is glass lenses is poor, but the surface hardening treatment can improve, but the effect is limited.
The thickness of the glass lens thickness: the love of beauty is human nature, too thick lens is very awkward, deepness myopia more regarded as more difficult.
Although recently there is a lot of improvement, but still relatively thick glass lenses.
Prone to deformation when frame: this is because the plastic lens density was lower than those of glass lenses.
Not resistant to high temperature, although for thermosetting resin material, but once the plating on multilayer film, the surface of the multilayer membrane may be caused by high temperature cracking phenomenon.
Above is the resin lenses and contrast the advantages and disadvantages of glass lenses, obviously, in aggregate, optical resin lenses or not do more harm than good, small make up recommend choose resin lens glasses, with the development of science and technology, resin lenses, dispersion, hardness function also constantly improve, believe that it's the preparation of resin lens of glass lenses.