Online shopping is not a rarely thing, and more and more people like to buy thing from online retailers. Because, things online usually cheaper than real local stores. Besides, it also can save you a lot of money. As the developing of online shopping, we almost can buy every thing from online internet. Now, even eyeglasses can be purchased from online retailers.
There are several kinds of eyeglasses according to its function. There are single vision eyeglasses, bifocal eyeglasses, progressive or multi-focus eyeglasses. Among those eyeglasses, progressive eyeglasses are popular in people who need correct vision different distance.
As we know, while we buy eyeglasses from internet. We usually search some stylish eyeglasses frame and choose lenses type and eye power. That is all done for the ordering. If you have weak eye power and for single vision eyeglasses, that might be enough. But if you choose progressive eyeglasses, you should pay more attention for the ordering. Different process from single vision glasses, progressive eyeglasses usually need more complex lenses and fitting technologies. So you should be careful when choose frame and fill prescription on line.
Generally speaking, the frame size usually fixed the size of lens, so if you choose frames for progressive eyeglasses, you should choose the frames which at least over 32mm for lens width. Besides eyeglasses frame, you should careful deal with your prescription. Make sure your prescription is the latest one. And you should have your PD and near PD on your prescription. Near PD is the distance between your pupils in millimeters when you are seeing something close-up. Near PD would be useful when fitting the bifocal lenses or progressive lenses. The near PD is normally 2mm to 3mm shorter than the PD for most wearers.
In a word, you should take seriously to deal with your prescription while you order progressive eyeglasses. For new progressive eyeglasses wears, they usually need about two weeks to adjust to them.
You may be interested in these eyeglasses：full lens photochromic polarized sun readers
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