Some Common Issues with Bifocal Lenses
Posted on: 28 March 2019 by Grace Lily
By visiting other places, you may find perfect of bifocal lenses. It seems as there is no issue with bifocal lenses. But the fact is this, they have some common issues.
The distinct feature of bifocal lenses:
Reading glasses with bifocal lenses is the distinct category of Prescription Eyewear Frames. The most exceptional features of bifocal lenses as they have distinct power with a visible line. The upper part of lenses is specific for nearsightedness and the lower part is for presbyopia. If we compare bifocal lenses with the reading glasses for single vision, bifocal lenses provide vision correction for nearsightedness people. Bifocal lenses are widely recognized for this advantage.
Who need bifocal specs:
Basically, visible line presents wearer has reading glasses that is developed by the result of presbyopia. Presbyopia always associated with the increasing age. Because most often, reading safety glasses are considered old age symbol. But for the middle-aged people, if they find a visible line that is unwanted for them. Unwanted in this sense as this line hide the charming look of the wearer. With the same point of view, bifocal optical is quite same as trifocals.
An apparent issue related to bifocal lenses is the visible line that usually sits horizontally in the center of that lens. Even new developing design like D-segment still have a visible line for the power separation. What is meant by? In fact, visible line divides the reading and viewing area for the wearer. You can order online RX eyeglasses for any lens types on www.eyeweb.com.
The main issue with these lenses as they create visual distortion. In some cases, people took a few days for making an adjustment with them. Severe headache and dizziness are some serious problems that arise by bifocal lenses. For some individuals, these situations even continue for a long time. Basically, these issues developed by two different power in one lens.
Nearsightedness and presbyopia are strictly separated with a single line. Such power separation creates a great visual discomfort to the wearer. Another flaw of these lenses is that they are not capable of the computer task. This issue can be resolved with trifocals lenses. All the mentioned flaws are quite true for reading prescription eyeglasses with plastic frames.
Difference between reading glasses and bifocal glasses:
Basically, reading glasses and bifocal reading glasses differ because of lens power. Lens materials and frame materials almost same use in these glasses. Because bifocal reading glasses are found in a plastic frame and metal frame as well. The main difference in both material as plastic frames are lighter than metals. You can avail 3M safety glasses for bifocal lenses on your work site. For further detail of progressive and bifocal lenses by reading these links.
The advantage of bifocal lenses:
But of course, in spite of bifocal lenses issues, they still have worth buying. Because nothing can totally be perfected. If we compare the advantage of bifocal lenses, the complications are not a big deal for the user. For example, some researcher suggests bifocal lenses because they help to control myopia in particular children as they need focusing for near work. Another main advantage of bifocal lenses is; they are giving a large viewing area for the distant objects.