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Most bifocal lenses are worn by the older peoples. Such as: some mothers, grandmothers and grandfathers, they are all wear bifocal eyeglasses. Regular bifocal means that one has both short sightedness and long sightedness. That means that images at most distances can’t be seen clearly. It is really quite dreadful, but luckily, we have the cheap glasses frames with FT-28 bifocal lens.
In fact, with the growth of our age, we may need bifocal reading glasses to provide a common problem among hyperopic individuals. We may just need to wear single vision prescription glasses in the days we are not so old, and now we have reading glasses, which are now a considerable portion for old people, you may have heard about a saying about “too short arms”, yeah, people who with this trouble are used to hold the reading materials, such as magazines and news paper at an arm’s length, that’s true, it is a common phrase that describes this eye disease vividly.
But for those who are both suffered from these two sight problem, bifocal reading glasses are needed, usually, the top the lenses is used for looking at distance, while the low part is for have a clear near view, people wearing single vision reading glasses will feel dizzy if they look up into the air, what’s more, these prescription glasses also solve the problem of inconvenience if people need to bring two separate pairs of prescription eyeglasses, and switch them at different circumstance.
Though these bifocal reading glasses are really popular these days, actually, they are far from perfect. Many people may feel visual dizziness, image jump and even headaches for the first time, even those who have the experience of wearing them may have the same feeling if they change them for a new pair, so, where are these unwanted problems come from? Some people say it is the fashion design effect lens function, but are they are closely linked with visual experience, how can we explain this? Actually, expertise suggests that’s because of lens design.
So, how many kinds of bifocal reading glasses lenses do you know? The first pair of this kids of prescription eyeglasses was designed by Franklin, who added half reading segments into another half of primary Rx lens, and today, we have many different shapes of the reading segments, such as D shape and round one and so on, but they are usually account for a small part of the whole lenses, so, there is a crossing line between the two incompleteness lenses, that’s the reason why it cause frequent image jump, when this situation occurs from time to time, there comes the headache and dizziness, so, people may need a period to get used to their new bifocal reading glasses.
Generally speaking, it is more beneficial than detrimental, and they are still very popular today. Cheapeyeglasses.net is an online eyewear style consultant who loves helping those new to find the perfect pair of bifocal eyeglasses. For great styles, including men’s and women’s reading glasses, sunglasses, and folding specs, be sure to visit her website.
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