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    Types of Prescription Glasses – Multifocal and More

    The type of prescription lenses you get depend on your eye conditions and your preference. Single Vision lenses correct a single vision problem like nearsight…

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    Types of Prescription Eyeglasses

    November 11, 2018

    Prescription lenses are the heart of what makes a pair of glasses provide the sharp, clear vision you want to have. There are several types of prescription eyeglasses to address your visual needs, whether you are nearsighted, farsighted or need multiple prescriptions in one lens:

    Single Vision – Single vision prescription lenses are used to correct a single vision problem such as nearsightedness, farsightedness, astigmatism. They contain the same amount of vision correction throughout the entire lens. In terms of single vision reading glasses, full frame readers are the most common. You’ll also find single vision lenses in half frame reading glasses which are narrower and sit at the end of your nose for easier up-close and distance viewing.Multifocal Lenses – People who have more than one vision problem often need eyeglasses with multifocal lenses. Multifocal lenses, such as bifocals and progressive lenses, contain two or more vision-correcting prescriptions.Bifocal – Bifocals contain two prescriptions within the same lens. The eyeglass lens is split into two sections; the upper part is for distance vision and the lower part for near vision. When you’re looking at someone who is wearing bifocals, you can often see the line between their nearsighted and farsighted prescription.Progressive – Progressives are multifocal lenses that contain three main fields of vision including near, intermediate and distance. However, progressives do not have a visible line between prescriptions. This gives the wearer a seamless and uninterrupted transition when looking from up-close objects to far-away distance.Computer Glasses – The lenses of computer glasses are designed to deal with eyestrain caused by computer screens. Computer glasses help with an intermediate distance of around 20 to 26 inches, which is the distance most people sit from their monitor. Many computer glasses have tinted lenses to block out blue light radiating from your electronic devices.Reading – Even if you don’t have an eyeglass prescription from your eye doctor, you may find yourself needing reading glasses. A valid prescription is not required to purchase reading glasses, though your eye doctor can tell you the magnification you need.

    During an eye examination in Medford, your doctor can determine your current eyeglass prescription and help you choose the right eyeglasses for your vision needs. Contact Medical Eye Center at 541-779-4711 or www.medicaleyecenter.com to schedule an exam today.

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    Source : www.medicaleyecenter.com

    Bifocal glasses guide: Types, brands, and tips

    Bifocal lenses have two parts. One corrects close up and one corrects distant vision. Several online retailers offer a convenient way to buy bifocals online.

    Buying bifocal glasses online: What to know

    Medically reviewed by Jenna Stoddard, OD — Written by Mary West on April 23, 2021

    We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. Here’s our process.

    Bifocal glasses contain two corrective prescriptions within each lens: one for seeing far away and one for seeing close up. A person can easily switch their focus between the two parts of the lens.

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    Many online retailers offer bifocals. These might be designer or brand-name, or they may be made by the retailer.

    Below, a person can find everything they need to know about buying bifocal glasses online.

    What are bifocal glasses?

    Bifocals have lenses with two segments. The top segment enables a person to see far away, while the bottom one enables them to see close up. Some bifocals have a horizontal line that divides the two segments.

    As the Optometrists Network observes, doctors usually recommend bifocals when a person has presbyopia. Before presbyopia develops, the lenses in the eyes can shift their focus between distant and nearby objects. As people age, their eyes lose this flexibility.

    Presbyopia is a normal part of the aging process, and it usually begins around age 40. It makes it harder to focus on nearby objects, such as a smartphone screen.

    What types are there?

    All bifocal glasses work in the same way, but they differ in appearance. Bifocals may have:

    a round segment a flat segment

    a half-moon segment, also called a flat-top, straight-top, or “D” segment

    an executive segment, also called a “Franklin,” in which the entire bottom half of the lens is for seeing close up

    A person might also be considering trifocals. These have three segments, for distant, intermediate, and close up vision. The intermediate segment helps a person see objects at about an arm’s length, such as a car dashboard. However, because of the added segmenting line, doctors do not prescribe them often.

    Another option is multifocal eyeglasses. These provide clearer distant, intermediate, and nearby vision — and they have no segmenting lines.


    The companies below offer complete lines of corrective lenses, including bifocals.

    Warby Parker

    Warby Parker allows potential customers to choose five frames to try on at home. It also provides a full refund or exchange within 30 days.

    The company also offers eye exams in several stores throughout the United States. In addition, it gives one pair of glasses to someone in need for every pair purchased through its Buy a Pair, Give a Pair program.

    Warby Parker does not currently have accreditation from the Better Business Bureau (BBB). However, at the time of publishing, the BBB gives the company an A+ grade.



    EyeBuyDirect offers virtual try-on technology. A person takes a photo of their face and the website shows them how they may look in different glasses.

    The company has a 365-day product guarantee and provides a one-time replacement. If a customer is unhappy with their purchase, the company provides a one-time refund or replacement within 14 days.

    EyeBuyDirect donates one pair of prescription eyewear for every pair that a customer buys.

    It has accreditation from the BBB. At the time of publishing, the BBB gives the company an A+ rating.


    Glasses USA

    Glasses USA also has virtual try-on technology, and its customer service team is available at all times.

    The company offers free shipping and returns, with full store credit or a full refund within 14 days of purchase. It also offers a 365-day warranty on all eyewear.

    Glasses USA currently does not have accreditation from the BBB. At the time of publishing, the BBB gives it a B grade.


    Zenni Optical

    Zenni Optical offers virtual try-on technology. It ships to the U.S., its territories, and internationally, for a fee.

    The company offers a lifetime replacement of nose pads and their screws, and it replaces broken frames within the first 30 days. If customers return their eyewear within 60 days, they receive either a 50% refund or a one-time 100% store credit.

    Zenni Optical currently has accreditation from the BBB. At the time of publishing, the BBB gives it an A+ rating.


    Glasses Shop

    Glasses Shop has a virtual try-on feature, allowing a person to upload a photo and see what they might look like in any pair of glasses.

    If a customer is unhappy with a purchase and returns it within 30 days, the company gives a 50% refund or 100% store credit.

    Glasses Shop ships to the U.S., Canada, and elsewhere, for a fee. It has accreditation from the BBB and, at the time of publishing, the BBB gives it an A- grade.


    When to see a doctor

    Anyone who may have presbyopia should make an appointment with their eye doctor. Symptoms of this normal aspect of aging include

    Trusted Source Trusted Source :

    difficulty seeing nearby objects clearly

    Source : www.medicalnewstoday.com

    6 Bifocal Contacts to Consider: Plus, Brands & Tips for Buying

    Looking for your first pair of bifocal glasses or an update? We look at tips and brands to consider for multifocal lenses.

    Tips for Bifocal Glasses Online and In-Person

    Medically reviewed by Madeline Knott, MD — Written by Corey Whelan on May 10, 2021

    We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. Here’s our process.

    Changes in vision seem to go hand in hand with getting older. Presbyopia, a common condition that occurs in middle age, causes changes in your eye’s ability to focus. These changes often result in the need for bifocals.

    Bifocals were invented by Benjamin Franklin, who solved his own vision problems by taking the lenses from his reading glasses and distance glasses and cutting them in half. He then remade the cut lenses into a single pair of bifocals, with the distance lens on top, and the reading lens on the bottom.

    Types of bifocal glasses

    Luckily, we’ve come a long way since Franklin’s time. There are now several types of bifocal glasses. They include:

    Reading glasses. These glasses don’t need a prescription. They’re comprised of a clear lens that contains a magnified section on the bottom to help with near vision.Traditional bifocals. Bifocal lenses contain two prescriptions that have a clear demarcation between them. The top of the lens corrects for farsightedness. The bottom of the lens corrects for nearsightedness. The bottom may be constructed as any of these configurations:

    half-moon (flat top)


    narrow rectangle (ribbon segment)

    full bottom (executive segment)

    No-line bifocals. These lenses provide a smooth change in focus, from the top to the bottom.

    Progressive vs. bifocal lenses

    No-line bifocals are sometimes referred to as progressives or trifocal lenses. Instead of containing two lenses of different strengths, progressive lenses have one lens with three viewing areas that gradually change in strength and magnification.

    Progressives correct for distance, intermediate, and near vision. They don’t contain any visible demarcation lines like traditional bifocals.

    How do bifocal lenses work?

    Bifocal lenses correct nearsightedness and farsightedness in one pair of glasses.

    The top of the lens contains a prescription for farsightedness. Your eye naturally looks through the top of the lens when you are driving, walking, or conversing with others.

    The bottom of the lens contains a prescription for nearsightedness. This portion of the lens may make up the entire bottom portion, or it may be smaller and centered in the middle. Your eye naturally looks through this section of the lens when you are reading, working on a computer, or doing closer tasks.

    How do I know I need bifocals?

    Vision changes can gradually sneak up on you, till you suddenly realize you can’t see as well as you used to.

    If you find yourself squinting at text that once was easy to read or your vision is blurry, see your eye doctor. You may need bifocal lenses or a change in prescription.

    If you currently wear glasses but see print more clearly when you remove them, that’s another telltale sign that bifocals may be in your future.

    Getting your eyes examined by an optometrist or ophthalmologist is the only way to definitively determine if you need bifocals.

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    Best places to get bifocal glasses online

    To use any online site, you’ll need a copy of your current eyeglass prescription. Prescription scanners, which are built into some apps, can’t read bifocal prescriptions.

    Before you start scrolling, keep in mind that bifocal lenses can be placed into most eyeglass frames, provided they’re at least 28 millimeters high. Most sites that carry bifocal lenses allow you to sort for this feature.

    There are many eyewear retailers online that can fill your prescription for bifocal eyeglasses or bifocal contacts.


    There are over 2,500 eyeglass frames that can accommodate bifocal lenses on this site. To make shopping easier, EyeBuyDirect lets you sort your selection by brand, material, shape, and cost.

    EyeBuyDirect has a virtual try-on feature. To use it, click “Try me on!” once you’ve found a pair of eyeglasses you like. This will take you to a virtual mirror, where you can upload a photo of yourself.

    EyeBuyDirect carries Ray-Ban, Oakley, and RFLKT eyewear, as well as their own eyeglass frames brand.

    Bifocal prescriptions cost an additional $29 over the cost of glasses.

    Each lens comes with a 14-day fit and style warranty for a one-time replacement or refund, and a 365-day product warranty if there are obvious defects in materials or workmanship.

    Two-day delivery, a feature on this site, is not available for bifocals.

    EyeBuyDirect doesn’t accept insurance, but they will supply you with an invoice for reimbursement for your insurance company.



    Glasses USA is known for deep discounts on designer and brand-name frames.

    You can upload your own photo to use their virtual try-on feature, or use any one of several model headshots instead.

    There are around 2,000 frames you can choose between that accommodate bifocal prescriptions. If you choose, you can sort the frames by gender as well as other features, such as brand.

    This site offers a 365-day warranty, 100-percent money-back guarantee, plus free shipping and returns.

    Source : www.healthline.com

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