How To Convert Glasses Prescription Into Contacts
Do you have your glasses prescription? Do you want to change it with a contact prescription?
There are 5 easy steps to make it possible.
Be careful, the process is very sensitive.
Follow the given instructions very keenly and get the results you want.
Lets start reading!
Note: Always start the process with your right eye. You can see on the prescription that the right eye refers to OD which means Oculus Dexter. It is placed right over the O.S.
Can I Convert My Contact Lens Prescription To A Glasses Prescription Or Vice Versa
Sphere and Power display the strength of your prescription and often remain the same regardless of a contact lens or glasses prescription. However, it is not possible to accurately convert one into the other as you will be missing other important parts of the prescription, such as CYL or AXIS data. Most contact lens prescriptions follow a similar base curve and diameter, however, we would always recommend getting your contact lenses professionally tested particularly if youre a first-time wearer as there are many different brands and materials to choose from.
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 Contact lenses are out-of-date after one year.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.
How Do I Read My Contact Lens Prescription
Remember: glasses and contact lens prescriptions are different.
If you want to purchase contact lenses, youll need a specific prescription from your eye care professional. In addition to the general parameters that weve mentioned, a contact lens prescription will include a Base Curve and a Diameter.
Is Glasses Prescription The Same As Contacts
Eyeglasses and contact lenses are valuable vision aids that allow people with refractive errors such as nearsightedness, farsightedness, astigmatism, etc. to see clearly and comfortably. You must have seen people using both eyeglasses and contact lenses in your family and friends at different points of time.This generally leads to a notion that since both eyeglasses and contact lenses are being used to correct the vision errors, they will even have a similar prescription. However, this is not true.
Why is glasses prescription different than lenses?Eyeglasses and contact lenses are made up of different types of materials. Contact lenses, in general, are made of hydrogel or silicone hydrogel. This material helps your contacts to stay moist and allows more oxygen to be transmitted through the contacts into the eye. Newer eyeglasses are in fact made up of advanced kinds of plastic in place of actual glasses. These glasses are lightweight, thinner, and better scratch-resistant than glass or older plastic types. Both contacts and eyeglasses also differ in their positioning with respect to the eyes. Eyeglasses are positioned around 12 mm from the eyes however, contacts sit directly on the eyes. Hence, different types of eye tests and measurements are required for each of them. This leads to differences among the elements of the prescription of the eyeglasses and contacts.
Prescription for eyeglasses and contacts: How are they different?
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Special Features On My Prescription
You may also find additional information on your glasses prescription such as the suggestion of certain types of lens coating and special comments from your optometrist.
1. Lens designs on a prescription indicate your eyesight requirement, detailing the lens design and function . Occasionally, youll see a specific brand of progressive or single vision lens written on the prescription itself. This is most often a recommendation based on a brand the doctors office carries. If you have questions about anything on your prescription, feel free to give a call to our customer service team.
2. Vision enhancement: a special treatment for one or both lenses used to improve vision and clarity through your glasses. You could find different options such as:
a. Anti-reflective coating: enhances clarity and concentration by allowing more light to come in and reduces reflection.
b. UV protection: to prevent your eyes from being damaged by the suns UVs, your lenses can come with special anti-UV treatment.
c. Transitions: these lenses are equipped with a technology that adjusts your glasses tint according to the light. When the sun comes up, your glasses turn into sunglasses!
d. Polarized: improved glass technology designed to filter and reduce glare. Polarized lenses offer more clarity and a sharper vision to their wearers.
e. Clip-on glasses: additional lenses that can be adjusted on top of your prescription glasses. They can be polarized and come in various formats..
What Is The Difference Between Progressive Bifocal And Single Vision Glasses
The differences between each type of glasses are not always clear. To understand how to correctly read a prescriptions for glasses, here is an overview of the main categories of lenses that can be written on your prescription.
1. Single vision lenses: a large majority of glasses come with single vision correction. This common type of lens is generally used to correct nearsightedness, farsightedness or used as reading glasses.
2. Bifocal lenses: these glasses come with two vision corrections. One is on the lower part of the lens to help you read or see from near, and the other on the upper part includes a distance prescription.
3. Progressive lenses: multifocal lenses offer multiple corrections in one pair. These prescriptions have a no-line lens and offer intermediate distance vision, which can be adapted for certain specific uses, such as computer work.
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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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How To Read A Contact Lens Prescription
Understanding your contact lens prescription can be tough if you arent familiar with the different numbers and abbreviations that eye doctors use. Looking at it, you might be wondering: Which numbers correspond to which eye? Wheres the strength of my contact prescription? And what is BC?
There may even be more information on your contact prescription than your glasses prescriptionand yes, the two prescriptions are different.
Thankfully, learning how to read your contact prescription is easy. Well go over all the terms youre likely to see for the different types of contact lenses, whether your prescription is on paper or on a box.
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What Is The Difference Between A Contact Lens Prescription And Eyeglasses
Before you make your choice of corrective eyewear, we recommend knowing what the difference is between a contact lens prescription and eyeglasses. Contact lenses go on your eyes, while eyeglasses go over them.
In addition to how the eyewear fits, the two types of prescription lenses vary in the materials used to make them. Your contacts may be made with various materials, including silicone hydrogel, while your eyeglasses may have titanium frames and polycarbonate lenses.
For those who need vision correction, you have many options. For instance, you may enjoy a great pair of eyeglasses in stylish frames, or you can opt for contact lenses if you wish to hide the fact that you need corrective eyewear.
But what is the difference between a contact lens prescription and eyeglasses? Lets find out.
Are Glasses Prescription And Contacts The Same Thing
Contact lenses and glasses are some of the important vision aids that we require to correct our refractive errors. People often choose both glasses and contact lenses to correct myopia, presbyopia, or hyperopia at different points in time. For many people, eyeglasses and contact lenses can be a bit confusing.
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Do You Have A Valid Eye Prescription And Are Ready To Shop
Now that you understand how your eye prescription works, you can learn how to buy glasses online at Clearly.
Pick a pair of frames online and enter your prescription details. Youll soon be rocking a pair of glasses that look great and make everything around you look great as well. Click to browse our collection of stylish and affordable glasses.
Fancy getting contact lens delivered straight to your door? Click to check out our wide selection of contact lenses.
Have more questions? We have various other ways to help you read your eye prescription. Contact us by email, live chat or phone.
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.
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Other Options For Figuring Out Your Eyeglass Prescription
Just remember that you can request your prescription details from the office where you last had an eye exam. Theyre required to share a copy with you.
If youre looking for other options to find out your prescription based on existing glasses, there are other scanning apps like the one GlassesUSA offers.
- Liingo RX Reader:Liingo Eyewear also has an app that you can use to get the prescription of your current glasses by downloading the app, calibrating hardware, and scanning your lenses.
- GlassesOn app: 6over6 offers its GlassesOn app to take measurements similar to GlassesUSA Prescription Scanner to get PD and lens details.
- Lens Scanner App:SmartBuyGlasses, an eyeglass retailer, partnered with 6over6 to offer its own version of an eyeglass scanning app.
What the Prescription Scanner app isnt for
The app doesnt accommodate:
The Differences: Base Curve And Diameter
If youre not sure whether you have an eyeglass or contact lens prescription, verify whether your prescription includes:
1. Base Curve : the number that indicates your contact lens shape. According to the steepness or flatness of your cornea, your prescription indicates how large your contact lens should be.
2. Diameter : a number indicating your contacts length to make sure theyll cover your cornea properly.
3. Brand: your eye doctor will determine the appropriate brand and type of contact lenses for you, according to your preferences and specific requirements.
4. Expiration date: your eye care professional will determine an expiry date for your prescription. Past that date, youll require a new prescription for contact lenses. These are generally set annually.
5. Corrective power: these are the numbers associated with the actual power needed in your lenses. These numbers often change between your glasses prescription and your contact lens prescription, especially with higher powers.
If you find the information displayed above on your prescription, you have a contact lens prescription.
Both the Base Curve and Diameter of a contact lens ensures a proper fit on your cornea and total eye surface. Those features ensure comfort and encourage eye health, including allowing proper oxygen to the eye. Youll also need this information if you want to order contact lenses online.
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A Note On Pupillary Distance
Your pupillary distance on prescription is the distance in millimeters between the center of your pupils . The PD indicates where youll be looking through the lens of your glasses. Its important to measure PD eye prescription correctly as inaccuracies can lead to eyestrain and distorted vision. Your optician will measure PD when fitting you for glasses.
Your Contact Lens Prescription
People sometimes ask, Is my contact lens prescription the same as my glasses prescription?
The answer is often not obvious, although in the great majority of cases, they are not the same.
Lets take an example of an eyeglass prescription:
- OD : -4.50 -1.50 x 180
The amount of correction is expressed in diopters, sometimes abbreviated as D. Here, the left eye needs a correction of -3.25 diopters. DS indicates a spherical correction only, and no astigmatism correction. The minus sign indicates correction for nearsightedness a plus sign would mean farsighted correction .
Here, the right eye has a spherical correction of -4.50D and an astigmatism correction of -1.50D. The degree axis of the astigmatism correction is 180.
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A Note About Colored Contact Lens Prescriptions
A contact lens fitting and a prescription written by a licensed eye care professional are required even if you have no need for vision correction and want only “non-prescription” colored contact lenses or special-effect contact lenses to change the appearance of your eyes.
A contact lens, regardless of whether it is used for vision correction or cosmetic purposes, is a medical device, and selling any type of contact lens without a prescription is illegal.
Page published on Thursday, January 10, 2019
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Differences Between The Prescription Of Glasses And Contact Lens
Before getting your eyeglasses or contact lenses, it is important to be aware of their differences.
As you know, eyeglasses are easy to understand and very popular as many of us like to wear them. If we talk about contact lenses, it is complicated as their prescription has the power of vision according to near and farsight.
Contact lenses are difficult to wear and so delicate that you have to care for them properly.
The Contact description has many specific terms that are essential to understand. Lets see them in detail:
Base Curve: This is the size of the lens that is also known as BC. You can know about actual BC in the shape of the cornea to fix it.
Diameter: The diameter or DIA is used to check the lenss actual size and guides you to fix it properly. The normal range of DIA is between 13.5-14.5.
Brand Name: The brand name and many other specifications are mentioned in the product in detail. If you sleep while wearing a contact lens, dont worry, each kind of lens has a fixed rate of oxygen breathability.
Expiry Date: Contact lenses have an expiration period that is mentioned on the prescription. Usually, it may expire after one or two years. After that, you have to get a new prescription from your doctor.
Lets try to understand the difference with this table.
Table for glasses and contact prescription:
Patients Name: XYZ Date: DD/M/Y
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Glasses And Contact Lenses Work In The Same Way Correcting The Path Of Light Entering Your Eyes So Surely The Prescriptions Are Interchangeable We Take A Closer Look
If youre reading this, theres a good chance youre wearing glasses or contact lenses and we hope youve already had two different check-ups, giving you a glasses prescription and a contact lens specification. But youve probably wondered if its possible to convert your contact lens specification to glasses, or the other way around.
Its certainly true that glasses and contact lenses both work on the same principle. Theyre both lenses that correct focus misalignments with your eyes by properly directing light rays onto your retina. But as lenses are a medical device, things arent quite that simple.
Where Is The Power On My Contact Prescription
You can find the power in the PWR/SPH column of your prescription. This field might also be labeled Sphere or Power. The corresponding number will be positive or negative, and represents the diopters of vision correction needed to counteract a refractive error in your eye and help you see clearly.
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Understanding Your Glasses Prescription
Reading a glasses prescription can feel like reading another languageand sometimes it is! Latin isnt uncommon in prescriptions, and, as with any specialized field, the abbreviations and terminology can be confusing to someone who doesnt work with them day in and day out.
Weve broken down some of the abbreviations youll find in your glasses prescription. The list below can help clarify what each set of letters, numbers, and symbols means:
- ODOculus dexter, which refers to your right eye
- OSOculus sinister, which refers to your left eye
- OUOculus uterque, or both eyes
- SPHsphere, which is the power of the lens that will correct your eyesight
- the positive sign in your prescription before the sphere number denotes correction of hyperopia
- the negative sign in your prescription before the sphere number denotes correction of myopia
- CYLcylinder, which measures the amount of astigmatism in your eye, if any
- Axisa number between 1 & 180 that signifies where the astigmatism is in the eye
- ADDused for reading glasses or bifocals, the ADD number signifies how strong any additional corrective areas of the lens should be
- Prismindicates if you need prismatic correction added to the lenses to address double vision
Not every prescription will have all of these components. Remember, if you have any questions about your prescription, your vision, or any part of your eye exam, your eye doctor is there to help you. Please ask for any clarification you need.