Bifocal lenses are some of the most beloved products for people with presbyopia and other eye problems, like astigmatism, myopia at the same time. However, here is some very information people should know if they want to buy bifocal lenses.
Generally, according to the comfort they can bring to wearers, bifocal lenses can be fallen into two sorts, namely conventional bifocal lenses and bifocal progressive lenses. There is some evident difference between the two- a division line. Conventional bifocal lenses have an evident division line in the middle of the lens, whereas no line can be found in bifocal progressive lenses. Therefore, the former type is called lined bifocal and the later form is called no-line bifocal. However, each of the two sorts has their own merits according to people’s different demands.
Some people may wonder how do bifocal lenses cost. The answer depends. Just because more efforts should be spent in making them, bifocal lenses are much expensive than ordinary lenses. That’s to say, people have to pay more money if they buy bifocal lenses than ordinary ones in the same place. However, there are some exceptions. If those lenses can be purchased from online vendor, they will be much cheaper than ordinary lenses from real optical stores. In addition, conventional bifocal lenses are cheaper than bifocal progressive lenses. This is because progressive lenses are some of the latest products in the industry. And their prescription and manufacturing process are much complicated than conventional ones. But there are also some exceptions among the two types. There are some high-end conventional bifocal lenses that cost very much and there are also cheap bifocal progressive lenses that can be afforded by almost all wearers. Anyway, people should choose the ones that fit their condition and situation most.
However, there are still some bifocal lenses problems. That’s to say, there may be some problems on the lenses due to different causes. And one of the great causes is wrong Prescription. Bifocal lenses must be prescribed in very accurate and meticulous way. Therefore, once any problem occurs on the prescription, there will be some problems in the lenses.
All in all, there is much other information about those lenses and people may visit some glasses websites if they want to know more about it.