As we all known ,with the increasing development of the internet technology, shopping prescription glasses online is very popular now. It is very convenient as you just click the mouse to choose the cheap and favourite glasses. The main reason is the online stores are virtual ones, with the costs massively reduced, meanwhile the online dealers may be the manufactures, and they produce eyeglasses then sell directly online. How to get a bargain online? I think the most important thing is to choose a professional shopping website.