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Lens Eyeglass
Aspects Of Bifocal Eyeglass Frames
Multiple visual aids provided by bifocal eyeglasses have been known by people across the world for many decades. The advanced functionality and convenience brought by bifocal reading glasses have definitely helped millions of presbyopic patients. Supposed to offer two kinds of visual correction, a bifocal lens has to be equipped with two focal points. This involves really unique design and skills. Some people may have the thought that a bifocal lens should be larger than a single vision lens, because there are two different powers that must be fused together. If this idea is proven, bifocal eyeglass frames should also be made in a relatively larger size. Only in this way can the users get clear visual fields that are wide enough. However, this is not the truth.
Lens technological advancements have enabled lens manufacturers to incorporate two or three different powers in a single lens easily. When it comes to progressive lenses, there are even dozens of focal points made into a single lens. So, it is absolutely unnecessary to worry about the inappropriate frame size caused by bifocals' lens design that is a little complex. It is equally understandable to say that bifocal eyeglass frames do not have noticeable differences from most of the regular, single vision prescription eyeglasses.
When it comes to frame material, bifocal eyeglasses are now available in nearly all possible options, like plastics, metals and even mixed materials. Their special lens functionality will not exert extra requirements on the frame design. Another factor is frame style. All of the three styles including full frame, semi-rimless and rimless can be seen in bifocal eyeglass frames. Each type will bring similar advantages as regular eyeglasses. Moreover, bifocal reading glasses have no additional requirements on frame color. This element is completely dependent on the customers' personal preference. Furthermore, some brands even provide bifocal reading eyeglasses that are compatible with clip-on sunshades.
C: Bifocal eyeglass frames have no noticeable differences from other types of eyeglass frames, in aspects including frame material, frame size, frame color and clip-on compatibility.
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Is polycarbonate eyeglass lens expensive?
Hi, I wear contacts all the time because my eyeglasses are thick! My power is -4.5 so its thick and embarassing. I want to try polycarbonate lens because I heard they are thin. But how much do polycarbonate lens cost? I doubt its cheap though. :c
Hi there. I understand your situation as I have almost the same Rx. There are three materials for you to choose from:
-plastic
-polycarbonate
-hi-index
Of these three, the plastic being the lowest price but also the thickest, I would rule it out completely. I would recommend the hi-index. These are the thinnest, lightest you can get. I usually recommend a high index to anyone over a -3.50. Try a local Sam's Club, Costco or Wal-mart. The Sam's Club by me is in a Costco market and so they have dropped their prices even lower than the other Sam's Clubs. Polycarbonate lenses are $74 there for both lenses and include UV, scratch resist, non-glare. Hi-index is $117 with the same coatings.Do know that lens prices vary from state to state and area to area.
Also, when choosing a frame it would be best for you to pick on that is on the smaller side. The reason? With your Rx your lenses are crafted where they are thinnest in the center and thickest at the outer edge. I really hope this helps you!
How to Choose Men's Eyeglasses : Progressive Lenses: Guide to Men's Eyeglasses