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What Is My Vision If My Prescription Is

How Do I Get 20/20 Vision

Should I wear my prescription glasses less so my vision doesn’t get worse?

The short answer if you wear glasses or contact lenses is that you probably already have 20/20 vision . Your prescription is designed to get you as close to normal or perfect vision as possible.

And dont forget that in the UK, we use 6/6, not 20/20 . But what does it really mean? Its deceptively simple: 6/6 means you can see from a distance of 6 metres what the average person should be able to see from 6 metres.The driving standard with regards to letters on the chart is 6/12+ so you don’t need perfect sight to drive, but as per government guidelines, its important your Optometrist checks you meet this minimum standard.

Other Reasons Why You Might Need A New Pair Of Eyeglasses

Apart from a new prescription, there are several other reasons why you may need to upgrade your eyeglasses. This includes:

1. Your Lenses Are Scratched

No matter how careful you are, sometimes its not possible to prevent small scuffs on your lenses. But remember: even if those scratches may seem small, they could be affecting your vision in ways you arent aware of, and may even lead to eye strain.

If your lenses do have scratches, your best bet might be to get a new pair or completely upgrade your eyeglasses.

2. Youre Having Trouble Cleaning Your Eyeglasses

The lenses of some eyeglasses are treated with special coatings such as:

While these coatings can be very beneficial, over time they do tend to break down, leaving behind a film that could make your eyeglasses blurry or difficult to clean – leading to less clear and uncomfortable vision.

3. Youre Out of Fashion

Modern eyeglasses are for so much more than just vision correction. Today, they are also a great fashion statement. If you havent had a new pair of spectacles for over a year, then you may want to visit your local optometrist or eyeglasses retailer for a much-needed upgrade!

Some Basics On Eye Prescriptions

Before describing some of the basic tests, however, it is helpful to first understand some basics about eye prescriptions as a whole.

When you visited your optometrist or ophthalmologist, he or she likely examined your eyes and ran some tests. Along with this, however, he or she also gave you a subjective test, where you answered a series of questions on your sight throughout certain points of the day. This combination of both a physical exam and subjective diagnosis leads to your eye doctor providing you with a prescription.

Your eye prescription itself, as you likely know, is summarized in a combination of letters, numbers, and symbols. All of these characters represent different characteristics of your prescription. For instance, SPH stands for sphere, which indicates the amount of lens power in your prescription. If you see a minus sign under this heading, it means that you are nearsighted. A positive sign, as you can guess, means that you are farsighted. The abbreviation of CYL, for instance, stands for cylinder and tells you the amount of lens power for astigmatism. If you dont see anything in this column, this means that you do not have astigmatism that needs correction.

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Understanding What 20/20 Vision Means

The number is based on you standing a distance of 20 feet in front of a Snellen or Tumbling E eye chart to test your visual acuity. If during an eye test you can read the big E at the top of the eye chart, but none of the letters below that, your vision is considered 20/200. That means you can read a letter at 20 feet that people with normal vision can read at 200 feet, meaning you have very poor visual acuity. If you can read the fourth line from the bottom of most charts, you vision is 20/20. Any line below that would be 20/15 or below and indicates that you have exceptional visual acuity. Each eye is tested separately as your eyes are designed to compensate for each other and would not give an accurate reading.

What Does My Eye Prescription Mean

My eye prescription is

27 November 2019

Understanding what your prescription actually means may feel like solving an algebraic equation, but it’s actually quite simple once you get the know what the numbers, symbols and letters mean. Don’t worry – we understand it can seem quite overwhelming, which is why we’ve put this guide together so there’s no need to puzzle over your prescription again.

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Suitability For Eye Surgery

At Ultralase, the SPH and CYL are added together to determine suitability for laser eye and lens replacement surgery. This is why we ask you to bring your most recent prescription with you to your initial consultation.

Of course, the optometrist will use a range of tests and eye examinations to check the health of your eyes and suitability for surgery. A personalised treatment plan is produced for every patient!

Saying this, there are certain factors that do need to be taken into account. For example, those with a PLUS prescription are required to be over the age of 35 to qualify for laser eye surgery. For these patients, implantable contact lenses or lens replacement may be more suitable.

You can use our suitability calculator yourself to find out which treatment your most in range for.

What To Know About Farsighted Prescriptions

Farsightedness, or hyperopia, is a refractive disorder that makes close objects harder to see than distant objects. It happens because the distance from the cornea to the retina is too short or because the cornea of your eye is not curved enough.

If youre farsighted, light focuses behind your retina instead of squarely on it.

For a farsighted prescription, the strength of the lenses will be marked with a plus sign. The more farsighted you are, the higher the numbers will be. For instance, a lens prescription of +4.50 is a stronger prescription than one thats +2.00.

Correcting your vision with glasses or contact lenses, for both nearsightedness and farsightedness, may also help prevent:

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Types Of Refractive Errors

Refractive errors are infamous for causing blurred vision, though each type affects vision differently.

  • Astigmatism affects vision at all distances, and occurs when the eyes cornea or lens is irregularly shaped, preventing the light from bending properly.
  • Hyperopia affects near vision, and occurs when the eyeball is too short, causing the light to focus behind the retina, instead of on it.
  • Myopia affects distance vision, and occurs when the eyeball is too long, causing light to focus in front of the retina, instead of on it.
  • Presbyopia affects near vision, and occurs as the lens hardens and becomes less flexible , affecting its ability to focus on near objects.

Eye Prescription Chart Example

What Different Vision Prescriptions Look Like | WebMD

Here are two examples of eye prescriptions, one for someone without astigmatism, and one for someone with it. Can you spot the differences and decode the terms youve learned? If so, youve learned how to read a glasses prescription like a pro.

A prescription written for someone with nearsightedness.

A prescription written for someone with nearsightedness and astigmatism.

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How Often Should You See Your Eye Doctor

The American Optometric Association recommends that you have an eye exam at least every 2 years if youre under 60 and every year if youre over 60.

Its important to have your vision and eye health checked regularly because some serious eye conditions, such as glaucoma, dont have noticeable early symptoms.

An eye doctor can test your eyes and detect changes early, which may prevent vision loss. The tests are quick and painless, and can also help detect the following eye conditions:

Determining Whether You Are Legally Blind

Before talking about how your eye prescription tells you whether you are legally blind, it is critical to further explore what legal blindness actually is. To put it simply, legal blindness in the United States is measured by looking at your central visual acuity and your field of vision. Your central visual acuity is essentially what is in front of you. As you can guess, your field of vision is then what you see to the sides, above, and below you.

To test your vision, your optometrist or optician will make you look at a Snellen chart, which is the familiar chart of mixed letters that you read from a distance of about 20 feet. The overall goal of this eye test is to compare your vision to a historical norm. When completing this test, you are considered legally blind if your vision is deemed to be 20/200 or less. This means that if there is an object located approximately 200 feet away, you need to stand 20 feet away from it in order to see clearly. By contrast, a person with normal vision can clearly see that object from 200 feet away. Your optometrist or optician may also give you a visual field test in order to test your field of vision. During that test, you may be considered legally blind if your peripheral vision is about 20 degrees or less.

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What Does It Mean To Be Nearsighted

Nearsightedness is the most commonly diagnosed refractive error. Nearsighted individuals have difficulty reading road signs and clearly seeing distant objects. This refractive error typically begins in childhood and stabilizes in early adulthood. Symptoms of myopia include squinting, eye strain, and headaches.

Will Your Eye Prescription Change

Is It Bad for My Eyes to Wear Non

Large fluctuations in your vision prescription over time arent normal and should be investigated . But small, gradual changes can certainly occur, especially as you and your eyes age.

For example, you can expect to develop presbyopia as you get older . When that happens, you might want to get a pair of reading glasses or incorporate new progressive lenses into your regular frames.

Even if you dont think your vision is any different and youre not experiencing any worrisome symptoms, its a good idea to get your eyes checked every year. Annual eye exams ensure that an optometrist is monitoring your eye health and updating your prescription as needed.

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What Is 20/20 Vision

“Normal” vision is 20/20. Someone with 20/20 vision can stand 200 feet from an eye chart and see it as clearly as a legally blind person sees it from 20 feet.

In most states, drivers must have 20/40 vision or better for an unrestricted drivers license. If you wear eyeglasses or contacts, your corrected vision must be at least 20/40.

The World Health Organization uses the following benchmarks to categorize visual impairment:

  • Near Normal visual impairment: 20/30-20/60
  • Moderate visual impairment: 20/70-20/160

How Bad Is My Eye Prescription

No eye prescription should be considered bad. Different prescriptions refer to different levels of correction needed to restore normal vision.

The American Academy of Ophthalmology uses the following benchmarks to classify the severity of nearsightedness or farsightedness:

  • Mild +/-0.25 to +/-2.00
  • Severe +/- 5.00

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How To Read Your Eyeglass Prescription

When you look at your prescription for eyeglasses, you will see numbers listed under the headings of OS and OD. They are Latin abbreviations: OS means the left eye and OD means the right eye. Occasionally, you will see a notation for OU, which means something involving both eyes. In general, the further away from zero the number on your prescription, the worse your eyesight and the more vision correction you need. A plus sign in front of the number means you are farsighted, and a minus sign means you are nearsighted. These numbers represent diopters, the unit used to measure the correction, or focusing power, of the lens your eye requires. Diopter is often abbreviated “D.”

For example, if your prescription says -1.00, you have one diopter of nearsightedness. This is a fairly mild amount of nearsightedness. If you are -4.25, that means you have 4 and 1/4 diopters of nearsightedness. This is more nearsighted than -1.00, and requires stronger lenses. Similarly, +1.00 would be a small amount of farsightedness and +5 would be more.

For people who have astigmatism, there will be three numbers in your prescription. The general form for writing these numbers is S x C x Axis

The S refers to the “spherical” portion of the prescription, which is the degree of nearsightedness or farsightedness discussed above.

Here are two examples of what prescriptions for eyes with astigmatism could look like:

-2.00 +1.50 x 180

+3.50 +3.00 x 45

Do You Have A Single Vision Or Multi Focal Prescription

How to Read your Eye Prescription

Prescriptions look different depending on if you have a single or multi-focal prescription.If you have single vision correction, this means your vision is corrected for either farsighted or nearsighted, but not both.

For single vision prescriptions, the ADD column will be blank. For bifocal or progressives prescriptions, your lenses will correct your vision for both near and far, and often times intermediate as well. For these prescriptions, you will see a number in the ADD column.

To keep your eyes in optimal health you should have an annual eye exam. This will also ensure that your contact or eyeglass prescription is up to date.

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And Finally What Does This Mean For My Contact Lenses

Everything weve described here is exclusively for glasses. Contact lenses need a separate specification and a separate consultation. Contact lenses are great if you are required to wear a mask and/or visor and for participating in hobbies without worrying about your glasses getting in the way, fogging up or accidentally breaking.Optometrists or Contact Lens Opticians can convert a spectacle prescription into a contact lens specification as part of a contact lens fitting. The diameter and curvature of a contact lens are only some of the factors to be considered, along with advice and support on safe lens use.

If youre keen to know more about contact lenses, ask a member of the team.

What Is A Diopter Count

Diopter is the measurement used for the strength of eyeglass lenses. The number under the OD and OS measurement in your prescription is measured in diopters.

Now that you understand those mysterious letters and numbers, you know how to read a glasses prescription! Knowing what they mean will also help you more easily discuss your prescription with your eye care professional.

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How To Read Your Eye Prescription

Youve gone to the optometrist, had your eye exam, and now its time to get your prescription. When you look at it, though, youre perplexedwhat do all these letters and numbers mean? How do they tell you what kind of glasses you should get?

Not to worry. Eye prescriptions can be confusing, but well explain all of their different parts so you know how to read one. Not only will it help you understand your eyewear better, it also makes for an extremely practical party trick.

Other Terms On Your Eye Prescription

Reading Your Eyeglass Prescription

Depending on the kinds of lenses you need, you may see other terms on your eye prescription, including:

CYL or Cylinder: This term is only relevant to people with astigmatism, and refers to the lens power needed to address it. Astigmatism means your eyes cornea or lens is not completely spherical. Therefore, patients with astigmatism need cylindrical rather than spherical vision correction.

Axis: Again, this is for people with astigmatism. Its the number on your prescription that determines the orientation of your astigmatism correction. Axis is measured in degrees, not diopters. The cylinder and the axis always go togetheryou cant have one without the other!

Add: Additional magnification. If you have age-related presbyopia, you may have difficulty reading text close up, and can reserve a section of your glasses lenses for some added magnifying power. Its sort of like having reading glasses built into your regular ones.

Prism: Sometimes, eyes dont move in alignment with one another, resulting in symptoms such as double vision.

To account for this condition, your doctor can add a prism to your lenses. The prism is placed in a certain position and orientation based on your prescription, which will also notate the direction of the prisms thickest edge, or base.

The prism will also have its own refractive strength, measured in prism diopters.

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How Can I Understand My Prescription

Your optical prescription will include at least one of the following:

  • Sphere This is the lens power, measured in diopters. It is preceded by a plus or minus sign, depending on the type of refractive error you have.
  • Cylinder This is the lens power for astigmatism.
  • Axis This is the lens meridian, and represented in a number from 1-180, depending on the degree of astigmatism.
  • Reading add This is the magnifying power that is added to the bottom segment of a bifocal or multifocal lens for correction of presbyopia or near-vision problems.
  • Regular eye exams are vital to ensure that your eyes and vision are healthy. If you are due for an eye exam, or have noticed any changes to your vision, schedule an appointment with your eye doctor as soon as possible.

    What Is A 125 Eye Prescription

    Not everyone has clear vision. Many people need glasses, contact lenses, or other corrective procedures to help with far or close-up vision.

    When a doctor writes a prescription to correct vision, it includes a number for each eye. Each number is broken down further into the Axis, SPH, and CYL.

    When you look at your prescription, the important thing to know is the bigger the number, the stronger the prescription. A stronger prescription means worse eyesight.

    A 1.25 eye prescription refers to the power of the lens used to correct the problem. Depending on the needed vision correction, it can have a plus sign or minus sign preceding it.

    Your prescription number will have a plus or minus sign in front of it:

    • means you’re farsighted
    • means you’re nearsighted

    The number, as opposed to the plus or minus, indicates the degree of vision correction needed.

    Eye doctors use diopters to measure prism power or focal length. They then use that measurement to determine lens power and provide an eyeglass prescription. For example, a -1.25 eye prescription means you need 1.25 diopters to correct nearsightedness.

    This prescription may be for your right eye or left eye .

    Additionally, prescriptions include prism measurements. These are instructions to the eyeglass manufacturer on where to position the prism in the lens. Theyre indicated by the following abbreviations:

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