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Progressive eyeglasses lenses have aroused great popularity since their design year of 1953, public has a resort the retail method of shopping such eyeglasses online. They are always the best choice for those patients who have vision problem of both near and distance view. Comparing with eyeglasses which also have the same effects as progressive ones, such as bifocal and trifocal ones, they have their own advantages, one of which is the sophisticated factors, bifocal ones always have a line in the lenses, and people can tell your age from this line, “aged” is associated with such glasses lenses, but you cannot see the line in a progressive lens. However, a big price is considered to be a obstacle of buying such eyeglasses lenses, actually, today’s advanced tech of PC and network make it possible for us to get cheap progressive eyeglasses online!
Cheap price is really a big advantage of buying progressive eyeglasses lenses online, but it also has some less competent in offering patients vision correction compared to local stores! Actually, we cannot complain it to the online shopping mode entirely, it because of the visual distortion, especially at the transition area between the two focal points, one for far and one for near, in the end, it may create regions of aberration away from the optic axis, and the reason why your vision sometimes will get distortion when you are wearing progressive eyeglasses lenses is that they combine a range of powers together in a single lens surface, and plus, the Rx of your eyeglasses will be added at this situation. So, if your don’t have a detailed prescription, it is really a risk to buy progressive eyeglasses online, you don’t only need to hand over your ordinary OS, OD, PD, but also Axis and so on!
Another problem of wearing progressive eyeglasses lenses is the lens fitting, people may have different PD fitting even if they have the same number of PD, you need those lenses can guarantee normal corrected vision at all distances. So, it is a better way to decide which frame fit your face well, and it’s really trouble to return them to the optician if they don’t satisfy your well after ordering it online. So, before coming to an online site, I suggest you can choose a local store to make sure the best parameter, such lens height, frame length and so on. I am sure you will get your cheap but high quality progressive eyeglasses online!
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