Be Cautious Of Purchasing Progressive Eyeglasses Online
The first progressive eyeglasses disappeared in 1953
. When they came out, they have received warm welcome among the public because of their incomparable benefits over bifocal glasses and trifocal ones. Thats why so many customers pursue their benefits. Many of them choose to switch from traditional bifocal or trifocal lenses into progressive ones.With the rapid growth of the optic industry and the widespread of the internet, many people tend to purchase progressive eyeglasses in online stores, even they may involve sophisticated factors. The most convincing reason of such a practice is the higher prices of progressive eyeglasses. Buying progressive eyeglasses online is the most acceptable for some individuals. They are particularly suitable for those who cant afford to the expensive eyeglasses.
The customers are willing to spend more time in the interacting with the salesmen, in favor of considerable savings. But to some extent, those online progressive eyeglasses are probably less competent in offering individual vision correction. So the buyers should be cautious of selecting progressive eyeglasses online.
The drawback of online progressive eyeglasses is closely related to the shortcomings of progressive lenses. Because of lacking the in-person check from an optician, these shortcomings will likely be magnified. The first problem is visual distortion. This can be easily explained that a progressive lens combines a range of powers together in a single surface. Progressive lenses must be carefully fitted according to the wearers pupil center of a distance-viewing reference position. Such a correct position is essential to guarantee normal corrected vision at all distances. So the customers should be careful with these details.
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