Nowadays, cheap eyeglasses can be found at the online optical stores. While at the online store, you have the opportunity to browse different kinds of eyeglasses frames, lenses and etc. There are many types of plastic lenses. The two most popular plastic lenses are the ally diglycol carbonate lens and polycarbonate lens.
The ally diglycol carbonate lenses offer opaque spectrums. The ally diglycol carbonate lens is resistant against corrosion and scratches. It is lighter than the standard glass lens. The infraction index of the diglycol carbonate lens is lower compared with the crown glass lens. The low chromatic aberration enables it to be used as sunglasses as well. Ally diglycol carbonate lenses can be dyed into different colors. Besides, ally diglycol carbonate lens won’t become damaged if it is exposed to chemicals and radiation product. It is also resistant against welding sparks.
Eyeglasses that are equipped with polycarbonate lens don’t crack easily. It offers a better light transmission. It is also able to absorb a large amount of ultraviolet rays. It has a high refraction index. Polycarbonate lens is used to offer vision correction for myopia. People with strong prescriptions can use the polycarbonate lens. The polycarbonate lens supports a good light transmission so fewer materials are needed to make the light focus on the retina properly. Normally, people with strong prescription have to wear thick glasses. The polycarbonate lens is thinner and lighter compared with the standard lens.
Cheap eyeglasses that use glass lenses are cheaper compared with the plastic lens. The glass lens can shatter into pieces when it is dropped on the ground. Because glass lens is fragile, it is not suitable for active children.
When shopping for glasses, make sure you check whether the store offers coupon code. The coupon code can help to reduce the cost. You can use the shopping comparison search engine to compare the prices of the eyeglasses. By comparing the prices, you will be able to determine which store is offering the cheapest eyeglasses. Customers are advised to buy from reputable stores. If the store is not reputable, there is a high possibility that you will be cheated. The store should have an online web presence for at least 2 -3 years. You should avoid new stores because they are not established yet. In addition, you should read customer reviews to determine the quality of the product so that you can make a wise decision.
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