Usually, bifocals are used to correct presbyopia for adults over 40. However, kids and young adults who have focusing problems can also use bifocals to reduce eye strain when reading or working.
The upper part of the bifocal lens corrects distance vision and the lower part corrects near vision. Generally speaking, when you are focusing on distant objects, you look up and use the upper portion of the lens. When you are looking at close objects, you look down and use the lower portion. Since bifocals contain two prescriptions, you can see a noticeable segment line between the two prescriptions within the same lens. Please note that you need to provide your ADD value when you order bifocal lenses.
Bifocal Lenses and Their Use
- A variety of lenses are available today, many of them are fulfilling a single purpose or multipurpose. So in this blog we will be discussing about Bifocal lenses, their use and working.
- Bifocal eyeglass lenses have two powers which helps you see objects at all distances when you lose the ability to auto-focus of your eyes with age, popularly known as presbyopia.
- Hence this specific function of Bifocal lens make its use amongst the people over 40 years to help compensate for the degradation of vision due to the aging process. The best Bifocal lenses are available.
- Bifocal lenses are nothing but the ordinary prescription glasses with an additional reading segment.
- Usually, the reading segment is positioned towards the lower part of the lens.
- Regardless of the reason you need a prescription for near vision correction, the best bifocal lenses work in the same way. A small portion in the lower part of the lens has the power required for near vision correction.
- The rest of the lens is used for distance vision.
Now the lens segment used for near vision correction can be of the following shapes:
- A half-moon ( flat-top, straight-top or D segment)
- A round segment
- A narrow rectangular area (ribbon segment)
- The full bottom half (the Franklin, Executive or E style)
Problems with Bifocal lenses
- Besides integrating two types of lenses in a single frame, bifocals do have some cons too.
- It may take a few weeks to adjust to Bifocal lenses.
- The bifocal line could be too high.
So to order the glasses online you must look for the best bifocal glasses/best bifocal lenses.
Bifocals are the most common type of multifocal. If you have more than one vision problem, you’ll probably get glasses with multifocal lenses, like bifocals or trifocals. These have two or more prescriptions to correct your vision. These are the best alternative for people above 40 years who generally require two glasses for separate visions. There are certain requirements on the frame for bifocal glasses.
That’s due to presbyopia, an age-related change that affects your eye’s lens. Bifocals and trifocals are conventional options for glasses because when looking through them wearers may notice that images may seem to “jump” as your eyes move past the defined boundary between the distance and near part of the lens.
Bifocal lenses have proved to be a very good alternative for carrying separate glasses for separate visions.
You get it all in one.