noun
definition
Spectacles that have corrective lenses of two different powers; used by people who need both distance and reading glasses.
Examples of bifocals in a Sentence
For example, you wouldn't want to choose a very shallow frame if you need to fit in bifocals.
However, some activities work best with bifocals situated elsewhere.
No one knows whether you have single vision lenses or bifocals.
For traditional wear, you will apply the bifocals to the bottom portion of the lenses, slightly in from the middle.
For example, if you frequently have to read material situated above your head, you can put the bifocals in the top, not the bottom, of your lenses.
The bifocals can be removed and reapplied so they can be moved to the bottom of the lenses later if necessary.
Since bifocal lenses often cost a bit more than single vision ones, bifocals that stick onto regular lenses are a good alternative for those who can't afford to spring for the pricier pair of lenses.
A stick on pair of bifocals could make seeing to read in them easier-and you still get to wear the style you'd like as long as there is enough room in the lenses for bifocals.
Very small lenses will not be able to benefit from a pair of stick on bifocals.
Between 1725 and 1750, a London optician designed the first temple spectacles, while Ben Franklin invented bifocals.
The accommodative intraocular lens, or IOL, procedure is a new option for those with cataracts or for those who suffer from presbyopia which results in the need for glasses or bifocals to read.
The only catch is that the glasses have to be single vision, so those who need bifocals will pay a bit more.
Lined bifocals usually run $99.99 for the two pairs plus the exam.
If you're looking for something different, such as line-free bifocals, there will be a different, slightly higher price.
You will usually have to call or visit an America's Best store for details on available packages that involve anything other than single vision or lined bifocals.
When this happens, many choose to use reading glasses or bifocals.
The tops of the bifocals should sit about two or three millimeters below your bottom lash line.
If adjustments to the fit need to be made later, that may disrupt the positioning of your bifocals.
If you are used to bifocals, you shouldn't have any trouble--again, as long as they're positioned correctly.
If you've never worn bifocals before, the line can take some getting used to.
Trifocals are similar to bifocals and also make a suitable fishing sunglass.
Progressive lenses are sometimes referred to as "lineless bifocals" but they really work a lot like trifocals.
We offer a wide selection of prescription lenses, such as high end, progressive bifocals, polychromics, and more for up to 70 percent off retail walk in store prices.
Bifocals are two for $99.95 and additional options are available but it is necessary to speak with an associate for pricing details.
Unfortunately, though, to see up close, you'll need reading glasses, bifocals, or a corrective contact lens.
For example, Frames Direct has Flexon items for men and women in shapes and sizes ideal for readers, single vision prescriptions, and bifocals.
When reading or focusing on an object up close, your eyes tend to look through the bottoms of the lenses (think of the way bifocals work).
However, if you need bifocals, trifocals, progressive bifocals (especially these), it could be hard to fit your prescription into such an abbreviated frame and lens combination.
No line bifocal reading glasses are sometimes known as progressive bifocals.
They're arguably superior to regular reading glasses and bifocals with lines for a number of reasons.
While the regular reading glasses you can buy at the drugstore are line-free too, sometimes a pair of bifocals is necessary.
There are several reasons why no-line bifocals a good choice for many people.
Since the need for bifocals usually hits in a person's 40s, a pair of lined bifocals may give away your little secret-your age.
There will, however, still be a transition period of getting used to bifocals as opposed to single vision glasses.
The lenses are deeper than many other cat eye styles, so they may be good for those who need bifocals.
Round bifocals are actually half moon shapes that are flat on the bottom.
Straight Top bifocals come in 28 and 35 mm sizes and are fairly standard, if old-fashioned as well.
Tying fishing lures, reading a map and browsing the newspaper are all instances where bifocals may be used.
For those who wear bifocals for a variety of reasons, the bronze lens can be perfect for almost any light situation.
They grip well, they have a sleek and sporty look, and the bifocals are hidden while only covering the bottom portion of the lenses.
No line bifocals give many the freedom from carrying two pairs of glasses and look like regular glasses so no one but you knows that you are wearing bifocals.
For those who need correction for both seeing distant objects as well as for reading, bifocals are an option.
Many shy away from bifocals since traditional bifocal lenses have a distinguishable line that separates the two prescriptions and can be noticeable on lenses.
Since bifocals are associated with aging, many steer away from them as not to reveal their age.
An alternative is line-free bifocals, which are cosmetically more pleasing and unnoticeable.
No line bifocals contain two separate vision prescriptions set into a single lens but do not have a visible line separation.
Like with traditional bifocals, one prescription is on the top and the other is on the bottom of the lens.
With line-free bifocals, also called progressive lenses, there is an area that allows for transition between the two prescriptions.
If you decide that you want to shop online for your no line bifocals, there are various sites to check out.
There's no measurement required for a pair of readers as there is with bifocals and other prescription eyeglasses.