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Are Contacts And Glasses The Same Prescription

Benefits Of Wearing The Right Prescription

Glasses and Contacts Prescription – What is The Difference? | SportRx

Wearing the right eyeglasses or contact lenses helps you see the world more clearly. When you consistently book eye exams, you keep on top of your eye health. You have an opportunity to discuss changing vision needs.

But sometimes vision changes between your regular scheduled appointment. Or your eyeglasses break. Or you forget to re-order your contact lenses. So what happens when your prescription is wrong or you borrow someone elses corrective lenses?

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How Is A Contact Lens Prescription Different Than Glasses

Believe it or not, you can get multiple prescriptions for corrective eyewear.

Contact lenses and glasses require different prescriptions. But why?

Weve broken down the differences between contact lenses and eyeglasses so you can make the right choice for your eyes. If you need recommendations, were always here to help.

Why Do I Need A New Eye Test For A Contact Lens Prescription

In addition to the numbers on your glasses prescription, your optician will need to make some additional measurements if youre planning to wear contact lenses. Your contact lens prescription will contain two numbers called the base curve and diameter , which determine the fit of the contact lens on your eye. Most disposable contact lenses come in a selection of base curves and diameters, and its important to find the one which will best fit your eyes.

If you have astigmatism, youll have to wear toric contact lenses and your prescription will include measurements of cylinder power and axis, which are needed to correct this condition.

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What We Liked About Eyebuydirect

Eyebuydirects collection is huge, which means youll find both a wide range and a lot of variations on similar themes. The search tools let you filter effectively by enough criteria that you can narrow things down quickly.

We really liked the glasses we got from Eyebuydirect, especially given the inexpensive pricing. The fully specd browline pair we ordered compared very favorably to name-brand versions of the same concept from Ray-Ban and others, with solid build, very clear optics and a wide field of vision in the premium progressive prescription we ordered, and the fit was in order with what wed expected from the online fit tools. A pair of basic Wayfarer-style frames we ordered as readers similarly met our expectations, with quality acetate construction and similarly good optical quality to the pricier pair.

Basic single-vision prescriptions are very inexpensive , while pricing for a fully loaded pair, before discounts, runs about $400 for house brands and in the $500 to $600 range for branded options like Ray-Ban. This is still very affordable compared to many brick-and-mortar opticians and high-end retailers, where youd spend in the neighborhood of $1,000 for a similarly specd pair but not far off major discount retailers like Costco.

Two-day delivery is available for a select range of frames, with single-vision prescriptions its about the cheapest way to get a pair of glasses in a hurry. With regular shipping, we got our glasses in nine business days.

Take A Photo For Your Pd Measurement

Reading Glasses Strength Vs Prescription Strength

Youll be asked to take a selfie with the magnetic card held between your eyebrows. This is done to measure your pupillary distance . This vital step ensures that the lens power of your eyewear is correctly centered.

GlassesUSA will then request your account information, and will provide you with your prescription, so that you can purchase glasses.

If you have a prescription on hand to compare your GlassesUSA prescription to, you can be better assured of its accuracy.

Privacy, please!

If information privacy is a concern to you, use any card that is credit-card sized or cover information like numbers and names.

  • straightforward and easy to use
  • fast and convenient process in the comfort of your home
  • less expensive than visiting your eye doctor

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What To Expect In A Contact Lens Exam

Youll require a proper fitting if youve never worn contact lenses before. A contact lens exam is similar to a standard eye exam but with some extra steps.

Your optometrist will ask you several questions about your habits and lifestyle during the exam. Your answers help them understand which type of lens will best suit your needs.

Afterwards, they will assess the curvature of your cornea and ensure your lenses fit the shape of your eyes. Your pupil size will help determine the size of your lenses.

With your optometrists help, you can enjoy clear vision with your new contact lenses. All you need to do is schedule an exam. If youre interested in contact lenses, book an appointment with your optometrist.

The Common Measurement Between Glasses And The Eyes Should Be 12mm

As previously mentioned, prescription contact lenses and glasses are not exactly the same. They do, however, serve the same purpose of correcting the vision.

Glasses are commonly positioned about 12 millimeters away from the eyes, whereas contact lenses rest directly on the surface of the eyes. The main reason why there is a difference between the two is because of how they work to give you the best vision possible.

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When To Update Your Prescription

Prescription lenses have an expiration date. Eyeglasses prescriptions typically expire between 12 years from the day of your eye exam. Contact lenses are out-of-date after one year. The timeframe is shorter for contact lenses because there are more significant risks requiring more frequent eye health evaluations.

There are 2 reasons for the expiration date. First, your eyes change over time, resulting in a prescription change. Second, its also crucial to routinely evaluate eye health. Even if prescription power is unchanged, there can be other changes. Eye exams help diagnose and manage eye diseases, including conditions that may not affect vision in the early stages of development.

Eye exams are recommended every 2 years for low-risk adults and annually for low-risk school-age children. Patients with a higher risk should schedule comprehensive eye exams more frequently, as recommended by their eye doctor. Then, your optometrist can determine if you need an updated prescription at your regular eye exam.

Try On Glasses Online: Virtual Tool

Glasses and Contact Lens Prescription Explained | Eyes Explained

Technology sure has evolved through the years. Even the frame styles are constantly changing, and innovations in prescription lenses are now top-notch. Besides all these, you can also queue up at eyeglasses stores to purchase your frames. Try on glasses has all the perks you can enjoy from the confines of your own space.

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Can I Obtain My Contact Lens Prescription

You are entitled to a copy of your contact lens prescription once it has been finalized. The point at which your Rx is final is the decision of your eye care practitioner.

In some cases this can occur after the diagnostic fitting. In many cases notably with GP lenses and specialty designs such as bifocal, toric, keratoconus, or post-surgical it may take several visits before a successful fit has been achieved and a prescription can be provided.

If the lenses will not be dispensed by the prescribing practitioner, it is important that whoever fills the prescription does so completely and accurately. A soft lens Rx typically includes a lens material name, design, power, base curve, and diameter. GP lens prescriptions usually have this information and more, such as the peripheral curve radii, center thickness, a special peripheral design and an optical zone diameter.

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Can I Use My Eyeglass Prescription For Contact Lenses

Glasses can provide you with clear vision, but what happens if you want contact lenses? Can you use your current prescription to get contacts? The answer is more complex than you think.

Glasses and contacts are similar, but they have a few key differences in how prescriptions work. Continue reading to learn more, including if you can use your glasses prescription for contact lenses.

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How To Read Your Contact Lens Prescription Or Rx

A typical contact lens prescription:
Eye

Below are the definitions of the symbols/abbreviations used in a typical contact lens prescription:

  • Eye – Which eyes the prescription line item is for.
  • BC – Base Curve
  • Brand – The brand name or type of contact lens that your Eye Care Provider has fitted you for.
  • Toric Prescriptions

    Astigmatism is blurred vision and is caused by an eye that is not completely round. Certain patients require contact lenses that are manufactured for toric or astigmatism correction. Prescriptions for these types of lenses contain two additional numbers that relate to the correction of the astigmatism. These two numbers are usually separated by an “X” and are indicated with the following symbols/abbreviations.

    Bifocal or Multifocal Prescriptions

    Some patients require lenses that are bifocal or multifocal. Prescriptions for these types of lenses will contain an additional number with the following symbol/abbreviation.

    • ADD – Also known as “Add Power” or “Extra Strength”
    Additional Rx Information
  • Your prescription will also contain an expiration date. This is typically one to two years from the date that the contact lenses were fitted.
  • Base Curve values range from about 8.0 to 10.0. The doctor fits the lens with the curvature most appropriate for your eye. Most lenses come in several different Base Curve values. If your prescription does not contain a Base Curve value, this is likely because your brand of lens only comes in one base curve.
  • Differences In Contact And Eyeglass Prescriptions

    Contacts Vs. Glasses: The Pros and Cons

    There are several differences between contact and eyeglass prescriptions. Here’s how to make sense of it all.

    • Contact prescriptions contain additional numbers and abbreviations that don’t appear in eyeglass prescriptions, including “BC,” for “base curvature.” This refers to the way that your cornea curves. It’s necessary to include this detail because the shape of your contact lens needs to correspond to the shape of your cornea to ensure a good fit.

    • Contact prescriptions also include the term “DIA,” which is short for “diameter,” or the distance from one edge of the contact lens to the other. This is measured in millimeters.

    • A contact prescription should name the brand of contact lenses that your eye doctor prescribes, as well as an expiration date for the prescription.

    • If your eye doctor gives you both prescriptions, you may notice some of the numbers listed alongside the corresponding abbreviations are different. This isn’t a mistake the prescriptions are different because people wear eyeglasses and contacts differently.

    • Contacts sit on the surface of your eye, while eyeglasses sit a short distance away from your eye. Because you’ll be looking through each lens from a slightly different distance, it’s necessary to adjust the prescription accordingly. This ensures each type of corrective lens does its job from the appropriate distance.

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    Contact Lens Vs Eyeglass Prescriptions: Whats The Difference

    June 14, 2021 by Michael I. Davis, O.D.

    Many people think that prescriptions for eyeglasses and contact lenses are the same and that they can be used interchangeably. After all, they both help correct your vision and help you see better, right? Unfortunately, this is not the case. If you want to wear both contact lenses and eyeglasses, you will need a separate prescription for each. Heres why.

    Proper Eye Test & Contact Lens Fitting Is Absolutely Essential

    Prescription contact lenses contain additional specifications that are not included in glasses. The additional specifications are determined once a comprehensive eye test and proper contact lens fitting are conducted.

    Your preferred optician must also have access to your past prescriptions. They must evaluate the fit of your current lenses in order to suit the size of your eyes. These may seem like mundane information but they do play a role in giving your eyes what they need.

    Read Also: Should I Get Glasses Or Contacts

    What Is The Importance Of The Contact Lenses Diameter

    The diameter of a contact lens is important because it determines how well the lens will fit the eye. A contact lens that doesnt fit well can lead to discomfort and even medical complications.

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    How To Read An Eye Prescription

    Glasses vs Contacts – Which is Better?

    Eye care practitioners use standard terms, abbreviations, and measurements to write contact lens prescriptions. You have probably wondered what the incomprehensible scribbles of your ophthalmologist mean and if you could ever learn to decipher them. You may not need to know all of the abbreviations and numbers in your optical prescription. However, learning how to read eye prescriptions, at least the basic terms, is useful, especially if you shop online.

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    Are Contact Lenses And Glasses Prescription The Same

    One of the most frequently asked questions is that are contact lenses and glasses prescription the same?Simple, they are not!

    The main reason for this is that glasses prescription are positioned approximately 12 millimeters from your eyes whereas contact lenses sit directly on your eyes. You can compare this to holding a magnifying glass at different distances.

    If you hold the lenses at an arms length and focus on an object, what you see is very different to when you hold it right up to your eye.

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    What Do The Abbreviations And Symbols On Both Prescriptions Mean

    Some of the abbreviations and symbols youll see on your eyeglasses prescription:

    • OD refers to the right eye. OS refers to the left eye. You may also see the abbreviation OU, which refers to both eyes. All are Latin abbreviations.
    • SPH stands for sphere, or the amount of lens measured in diopters .
    • CYL stands for cylinder, indicating the amount of power you need to correct astigmatism.
    • Axis is what tells you the orientation of the astigmatism.
    • ADD stands for addition, and is used in bifocals to add correction for farsightedness.
    • PD indicates the pupillary distance, or the distance between the centers of your pupils.
    • A minus sign indicates you are nearsighted.
    • A plus sign indicates you are farsighted.
    • The further from zero the number is on your prescription, the stronger your prescription is.

    In addition to many of the above, your contacts prescription will include the power, base curve and diameter, as well as the contact lens material and brand or type of contacts.

    • Power is the same as sphere .
    • BC is the abbreviation for base curve, the measurement of the curvature of the back surface of the contact lens. Its determined by the shape of your cornea.
    • DIA stands for diameter, and indicates the size of your lends. It works with the base curve to determine how your lens will fit.
    • The contact lens material and/or brand is indicated because different lens materials have different degrees of oxygen permeability. Your eye care professional will know which one is best for you.

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    Are There Different Types Of Contact Lenses Which One Is Right For Me

    There are different types of contact lenses available for different prescriptions. Your optician will choose the correct type of lenses for your prescription to prevent damage to your eyes.

    For example, many people who wear glasses are not aware that they have astigmatism, a condition in which the irregular curvature of the eye causes blurred vision. Glasses correct astigmatism with lenses that are held firmly in place by the frame. However, contact lenses can rotate in the eye since they float on a thin film of tears. Thats why people with astigmatism need a special type of contact lenses called toric lenses to correct this condition. Toric contact lenses are designed for rotational stability to ensure they remain correctly oriented in the eye. An optician will flag this during your consultation and prescribe the correct type of lenses for you.

    How To Read A Contact Prescription

    About Your Prescription

    Thinking about switching from glasses to contact lenses? Or are you considering alternating between wearing contacts and glasses?

    You may notice that your contact prescription looks different than your prescriptions for glasses. If you’re entirely new to receiving prescriptions and you’re planning to correct your vision with contacts, the text on the slip of paper may look like a foreign language.

    Understanding the abbreviations and numbers may seem complex, but once you know how to read a prescription, you should be able to decipher any contacts prescription that comes your way.

    Learn more from the eye care professionals at The EyeDoctors Optometrists about how to read a contact lens prescription.

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    Will I Need Both Prescriptions

    If you choose to wear contacts, you will still need to have a pair of glasses, so youll need prescriptions for both.

    Contact lenses are fantastic, but in the event you develop irritated or dry eyes or come down with an eye infection, youll need to give your eyes a rest. Glasses are a better choice in this case since they dont sit directly on the eyes surface. This can give your eyes the time they need to heal.

    If youd prefer only to have glasses, you wont require the testing and measurements needed for a contact lens prescription.

    Knowing A Contact Lens Diameter

    Diameter or DIA is the distance across the surface of the contact lens measured in millimeters. The contact lens diameter determines where the contact lens will sit on your eye. The figure is usually between 13 and 15, and if the measurement isnt correct, the contact lens will be uncomfortable and may scratch your eye.

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