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Od And Os Meaning Glasses

If You Do Not Wear Your Prescription Glasses As You Are Required To Does It Lead Your Eyesight To A Worsened State

Understanding Your Prescription – OD vs. OS | SportRx

If you are worried about not wearing your glasses regularly and facing repercussions like eye damage or drastically weakened sight, you can rest easy with the knowledge that the worst to come is the resurfacing of the symptoms specific to your issue like headaches, blurry vision or having to strain your eyes or squint when you have myopia.

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Od Vs Os: How To Read Your Eyeglass Prescription

Written byResurchify | Updated on:

Finding out your eyesight has weakened and that you now require the aid of spectacles to see as well as you once did is not a pleasant thing to hear. Sure, it is not terrible you can still see. But, now, you need to rely on something other than just your eyes for every waking moment’s visual information input. It is not at all a pleasing habit to get into, especially for newbies.

The first time you get a prescription for your eyes, you can not help but think it is wildly different from the ones you get from your healthcare provider when you get a fever. All you can see are numbers littering the piece of paper up and down and strange words from which you are familiar with only two words: left and right. And that too is rarely ever put in in such prescriptions.

There is absolutely no need for you to feel crestfallen about it. There is nothing wrong with not understanding a doctor’s prescription. After all, that piece of paper is more helpful to the eyeglass supplier you will need to visit to obtain your glasses. If anything, you simply need to familiarize yourself with a single set of numbers.

Is It Possible For Your Farsightedness To Remain Constant Throughout Your Life Especially If You Got Your First Glasses At A Young Age

Typically, farsightedness occurs at a young age before gradually worsening as you grow older. Once you enter your twenties and step into adulthood, your vision starts to stabilize, and frequent changes in power decrease.

Fun Fact: Did you know that staring too long at your TV screen does not ruin your eyes, contrary to what you have been told ever since you could remember?

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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.

What Does Balance Mean

See Things Differently

This is a simple one. Balance means you have the same prescription in both eyes, and is usually the result of one eye having no vision. Putting a prescription lens in front of an eye without vision is primarily for cosmetic purposes and making your eyes appear the same size. A + prescription makes your eyes look bigger, while a – prescription makes them look smaller. As the prescription gets stronger, the size difference is more noticeable.

Another reason for both lenses having the same prescription has to do with lens thickness and weight. Both lenses will weigh the same and make your glasses fit more comfortably on your face.

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Why Are Glasses And Contact Lens Prescriptions Different

Prescriptions for glasses and contact lenses are different because of their different shapes and functions.

Glasses sit in front of your face and do not make direct contact with your eye. While wearing glasses that are not made to fit your prescription is not recommended, doing so will not harm your eyes.

Contacts are used in a completely different way. Instead of sitting in front of your eyes, they sit directly on the surface of your cornea. This means that each pair must be made to fit the exact eye size and shape of the person they are intended for.

If your contacts do not fit your eyes properly, they will not stay in place while you are wearing them. Not only will this make it difficult to see, but it will also put you at risk of eye infections and injuries.

What Does 225 Mean For Glasses

If your prescription reads +2.25, that means your eyeglasses need 2.25 diopter of strength to correct farsightedness. Remember, the higher the number, the more correction your vision needs.

Again, 2.25 glasses are a mild number between +/- 2.25 to +/- 5.00. It is also required to moderate numbers. +2.25 also means that the patients belong to long-sightedness, so objects up close appear more blurred.

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Add Vs Powers For Readers

Some people think the ADD number is the power needed for over-the-counter reading glasses , but its not the same thing.

To get the right number, you need to do a little math.

To find the right reading glasses, add the sphere number to the ADD number.

In the above example, for the right eye, this would be -2.00 and +1.75, which equals -0.25. For the left eye, add +1.00 and +1.75 to get +2.75.

Next, look at the cylinder measurement and the axis measurement.

In the example, the correct number for the right eye is -0.25 -0.50 x 180 while the correct number for the left eye is simply +2.75.

The example was chosen to show the difference between nearsighted and farsighted prescriptions. For most people, the numbers are usually similar in power for both eyes.

Special Features On My Prescription

OD & OS In Eye Glasses 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..

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How Is A Glasses Prescription Different Than A Contact Lens Prescription

The measurements given for prescription eyeglasses and contact lenses are never the same. Learning how to read an eye prescription for both may be important to some people, but learning the difference between them is crucial for everyone. An eyeglasses prescription is valid for glasses only. It doesnt contain the vital information a contact lens prescription has. The only way to obtain this information is by going through a contact lens fitting and consultation.

A contact lens prescription specifies the lens diameter, the back surface contact lens curve, and often the manufacturer or lens brand that specializes in specific vision conditions.

Eyeglass prescriptions are usually stronger than contact lens prescriptions because we wear contact lenses directly on the eyes cornea, while we wear the glass lens further away from the surface of our eyes.

Understanding Your Eyeglass Prescription

After your eye exam, the doctor hands you a small slip of paper covered with confusing numbers. You take it, without even looking at it, straight to your optician, who uses it to make your next pair of lenses. At no time do you understand any part of the process. Sound familiar? While you dont really need to understand your eye prescription, in the sense that you dont really need to understand how electricity works in order to use itits definitely good to know what is going on with your eyes so you can track any changes, spot any mistakes, and understand what your prescription means to your day to day vision. Here, well demystify the eyeglass prescription so you can finally know for sure what the numbers mean.

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What Do These Lens Abbreviations Mean

Lenses are made with many designs and features to optimize vision. Some of the terminology used to describe these features include:

  • SV Single vision. There is only one prescription throughout the lens.

  • BF Bifocal. A lens in which the distance prescription is placed on the top of the lens. The near prescription is placed on the bottom portion of the lens and marked by a line.

  • PAL Progressive addition lenses. These lenses progress from distance to intermediate to near prescription without a distinct line.

  • AR Anti-reflective. This is a coating on lenses that reduces glare.

  • PD Pupillary distance. This is the distance between the center of the pupils of the left and right eyes in millimeters.

  • SH Segment height. This is the distance from the top of the near vision portion of the lens to the bottom of the lens in millimeters.

Glasses can also have tints, such as yellow, amber, brown or red, to block out blue light.

Transition lenses lighten or darken the tint in your glasses depending on the light level. Polarized glasses are also an option to prevent glare.

To make the most out of your visit with the optometrist, it is helpful to recognize and understand the abbreviations you will encounter. Armed with this knowledge, you will know when OD refers to your right eye and when it refers to your eye doctors professional degree!

How To Properly Read Your Eyeglasses Prescription

OD vs. OS: What Do They Mean?

When you read your eyeglasses prescription, all you may seeis a series of strange numbers and letters. While it looks mysterious, each ofthose notations has a specific meaning. By understanding what your eyeglassesprescription says, you can learn more about the current state of your visionand the corrections your optometrist or ophthalmologist ordered. If you want toread yours properly, heres what you need to know.

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Why Do I Need To Buy Glasses With My Eye Prescription

If you dont have proper eyesight, then you cannot tell the difference between different shades of color when looking at objects through your glasses. This is very dangerous when driving a car or crossing the street. If you have a special type of eye disease such as cataracts or macular degeneration, then you may not be able to see anything at all without glasses. It is recommended that you wear glasses on a daily basis if you have a serious eye disease.

What Is The Connection Of The Retina With Farsightedness And Nearsightedness

The retina is a layered structure of nerve tissue at the back of your eyes. These layers of nerve tissue are light-sensitive and help you perceive your visual surroundings when light enters your eyes and falls directly upon them. It helps you form an image, helps you see. However, when you become nearsighted, the light entering your eyes falls short of the retina, forming the images in front of your retina rather than directly on it. Similarly, the light entering your eyes when you are dealing with farsightedness fails to aim directly at your retina, and instead, rather than falling short of it, it forms an image behind it. In short, farsightedness and nearsightedness occur when the light from your surroundings fails to directly target your retina as it should.

Fun Fact: No, wearing your grandpa’s glasses to see what it feels like to wear glasses does not make your eyes weak, even though you can experience dizziness and disorientation.

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What Are Od And Os

They are abbreviations of Oculus Dexter and Oculus Sinister. These are the Latin terms for the right and left eyes. The OD indicates your right eyes parameters and OS shows your left eyes parameters.

Nowadays, these abbreviations are common in being replaced by RT and LT because theyre easier to decipher .

How To Convert Eye Prescription Into Glasses Prescription

Glasses and Contact Lens Prescription Explained | Eyes Explained

It is important to know how to convert your eyeglass prescription into vision reading. This is a way of converting an eye examination number into reading vision for individuals who wear glasses or contacts. This allowed you to compare your vision with other people of the same age and gender.

OD vs. OS: How to Read Your Eyeglass Prescription

OD are abbreviations for Objective Diameter and OS are abbreviations for Objective Size. These two terms are interchangeable since they have the exact same meaning. For instance, if you are looking at your eyeglass prescription and it says OD-51 and OS-150, then this means that the largest line is 51mm across from one edge to the other, while the smallest line is 150mm.

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Reading Different Prescription Formats

Whether the prescription is vertical or horizontal, the most important thing is knowing how to read the letters and numbers and understanding what each refers to. Its not enough to only know the meaning of OD or OS.

The spherical correction measured in diopters is the first number you should expect to see after the common O.D., O.S., or O.U. Its marked as SPH and used to identify how strongly the lenses need to correct your vision. A minus next to the number means you are nearsighted. A plus next to it or no sign at all means youre farsighted. A high number means you need a strong prescription, regardless of the plus/minus signs.

Regardless of format, a vision prescription often includes the pupillary distance as a measurement, too. Marked as PD, it refers to the distance between your pupils.

What Do The Abbreviations On My Contact Lens Prescription Mean

Contact lenses need extra measurements and have additional terms and abbreviations. Here is a brief summary of some terms you may see on your contact lens prescription:

  • BC Base curve. This is a measurement of how flat or steep a lens is.

  • DIA Diameter. This is the size of the contact lens in millimeters.

The contact lens prescription will also contain information on the power of the contact lens, the brand and type, and the expiration date.

READ MORE:Understanding Your Contact Lens Prescription

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What Is My Optometrist Saying

Going to any doctors appointment, whether its your eye doctor or a general physicians office, can be overwhelming as a patient. It doesnt matter if its a routine checkup, or if youve been requested to come in, it can be a bit hard on the nerves. What makes it slightly more stressful is not knowing what your doctor is trying to tell you.

This isnt your general language barrier here, this is that medical jargon that youre not used to hearing in your everyday life. Therefore, weve rounded up the most common terms you would hear or see at your optometrists office and deciphered them for you.

Please keep in mind, we’ve kept things at the most basic level as to make it easy to remember.

Is There Any Way Of Naturally Getting Rid Of Your Eyeglasses And Correcting Your Vision

Full Eyeglasses Prescription Guide

There have been no discoveries yet of such techniques for a natural correction of weakened vision. However, there are some exercises that you may find yourself being advised to undertake to relax or exercise your eyes and their muscles. You will also be frequently advised to blink more often and deliberately while working long hours in front of screens.

If you are facing difficulty comprehending the meaning of your eyeglass prescriptions, the best initiative to take is to confer with your eye care provider directly. They can impart you a better understanding of the terms and numbers and how they relate specifically to the problems you are having with your vision and eyes. The explanation given above is just what the terms mean generally, and they do not include any particular relation to you, which might set a limit to your understanding of them.

Having mentioned that, it is also important to display disapproval on the matter of researching medical and health-oriented topics on the internet and not seeking actual professional advice. It is heavily recommended that you consult appropriate healthcare providers regarding diagnosis and prescriptions.


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What Is Considered To Be A Bad Eye Prescription

The higher the SPH number and the farther away from zero it is, both in the negative and positive, the stronger the prescription. A number over 5 is typically considered to be on the stronger end of the spectrum.

But, at Della Optique, we remind our patients that an eye prescription shouldnt be judged as good or bad. Instead, think of it as an objective measurement that provides information to help you improve your eyesight.

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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