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Today, when a person needs to buy eyeglasses, there are always two basic options, plastic or metal ones. Then we can choose other elements, such as frame style, full-rim, half-rim or rimless eyeglasses, and brand is also an important factor, people love to wear them because the manufacturers always can guarantee a high quality! Perhaps, the greatest invention of eyeglasses in 20th century is plastic lenses, before this, glass material ones are the only choice, they are so fragile that you should take care of them especially carefully! I cannot even imagine how people who need to wear glasses can play sports, such as basketball or football, it is really dangerous if the lenses get broke! What’s more, these glass materials are really heavy, it is really a burden for a wearer, and that’s the reason why there are so many people have obvious nose pads spots on the two sides of their noses! Because of these disadvantages, we have the chance to choose plastic lenses when we buy eyeglasses either at local stores or online sites!
It is estimated that approximately 68% of the world’s lenses are made of plastic. So, today’s plastic materials solve the problem of heavy and shatter easily of old day glass ones! CR-39 eyeglasses lenses may be popular for most wearers today, and it is now a standard material for producing lenses for eye wears! They are lighter, safer and more durable than glass lenses. Actually, CR-39s are not simply original plastic lenses, they progressed for a couple of decades’ to reach today’s additional advantages! Such as UV rays protections, we all know that it is really harmful for our eyes, especially for the kids, some experts insist that 70% of whole life UV absorption is formed before the age of 18! And cause many kinds of eye disease in the later of life! And you can choose to order scratch-resistant coatings for your lenses as well when buy eyeglasses!
Polycarbonate lens is another kind, which we also call it PC lens, and it features impact resistance, temperature resistance and optical properties. And they are thinner and lighter than the CR-39, which we talked about above, but 10 times more impact-resistant than regular plastic lenses. That’s the reason why children get great benefit from such materials!
All in all, plastic lenses are really a great innovation, and their huge advantages make them to be the domination of today’s eyeglasses lens market! When a people need to buy eyeglasses, he or she will absolutely know such lenses more and more! |
