Bifocal eyeglasses are not like your regular eyeglasses because they have two lens powers instead of one. This ensures that you can see things clearly at more than one distance. If you have trouble seeing things clearly at near or far distances, then this is the type of eyewear that you should choose. Otherwise, you may have to spend extra to see things clearly at different distances.
How Much Magnification is Required?
Before you choose bifocal eyewear, you need to know how much magnification is required to correct your vision. You can find this out by getting your eyes examined by an eye doctor.
The next thing that you need to pay attention to is the frame. You need to choose a suitable frame style and the frame should also be made of the right material. If you get this right, your bifocals will provide you with the best service.
Convex Lenses
At first, when you wore bifocal glasses, they had convex lenses which had near vision correction in the lower part of the lens and the higher part of the lens had the lower convex lens to correct your far vision problems. Also, up to the start of the twentieth century, two distinct lenses were cut in half and then put together in the frame. This, however, created complications and the eyewear also became very fragile. Modern bifocals have a pair of lenses that are fused together. They are also made by molding one segment (for reading) into the main lens.
Multiple vision problems?
In any case, if you have more than one vision problem, then instead of buying separate glasses to correct each vision problem, you can opt for bifocal eyewear which combines two different powers to correct both near and farsightedness.
In most bifocals, the main part of the lens is designed to correct farsightedness. So, if you have myopia, you can use these items of eyewear. The bifocals also have a tiny portion of the lens that corrects your nearsightedness. This part of the lens is made in different shapes including the half-moon shape and even a full-moon shape.
Correcting near and farsightedness
Bifocals are designed mainly to correct far and nearsightedness. There is a visible line that divides the two powers through today, these eyewear items are available without the dividing line.
Bifocals work well because they simultaneously focus your eyes at the right place. If you are not used to multiple lens power eyeglass lenses, then you can rest easy knowing that the main advantage of bifocal eyeglasses is they do not distort your vision even when you switch powers.
The bottom line is you should choose bifocals if you have near and far-distance vision problems.
Who Should Wear Bifocal Glasses?
If you are over 40 years of age, then you probably have near and far distance vision problems. Children and adults too can use bifocals to correct such vision problems. Now that you know a little bit about bifocal eyeglasses, go ahead and shop for them at a good online store that sells quality eyewear at the most affordable and cheap prices.
