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Doctor insights on: What Does Cylinder Mean In Eye Prescription

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Can you please explain what this eye prescription means? 0.D. Cylinder -0.25 axis 90 o.S -0.50 axis 75?

Can you please explain what this eye prescription means? 0.D. Cylinder -0.25 axis 90 o.S -0.50 axis 75?

Don't worry: It means that you have an incredibly weak prescription and probably don't even need glasses. ...Read more

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My daughter's eye prescription is od -3.00 sphere +2.00 cylinder 110 aaxis and os -6.00 sphere +2.50 cylinder 30 axis what does this mean?

My daughter's eye prescription is od -3.00 sphere +2.00 cylinder 110 aaxis and os -6.00 sphere +2.50 cylinder 30 axis what does this mean?

OD is right eye,: OS is left eye. The first #s. sphere, are negative, meaning she is nearsighted. The second #s (cylinder) is the amount of astigmatism that is present. Since astigmatism means the eye is focusing light at an angle, astigmatism comes with a rotation axis. The cylinder is rotated to this axis so that the light can be focused straight on. ...Read more

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What exactly does the number for my eye prescription mean?

What exactly does the number for my eye prescription mean?

It means: There are many numbers that make up a eye glass prescription. They may include the amount of nearsighted or farsightedness, the amount of astigmatism, the location of the astigmatism, whether the glasses or single-vision or multi-vision, the amount of prism in the glasses, the amount of additional power for close work.

There are other specifications as well. ...Read more

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I have -8.00 eye prescription! Does that mean I going blind?

I have -8.00 eye prescription! Does that mean I going blind?

No: If the only thing wrong is you need this lens power, which is not rare, then you should not go blind unless there is something else wrong with your eyes and vision. ...Read more

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Recently my contacts have become very blurry, even straight out of the box. Does this mean my eye prescription has changed?

Recently my contacts have become very blurry, even straight out of the box. Does this mean my eye prescription has changed?

Probably: Although it could mean many other things, such as the onset of diabetes and an eye disease. Make an appointment with an ophthalmologist for an exam. ...Read more

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What do the negative and positve numbers on eye prescription mean?

Lens power: These numbers describe the refractive power (strength) of the lens. Negative numbers represent a diverging lens which helps near-sighted people. Positive numbers represent a converging lens which helps far-sighted people. ...Read more

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Eye prescription says: R. -0.50 Sphere. ...L. -1.25 sphere. .. what does these numbers mean? What diagnosis does it represent? Thanks drs...

Eye prescription says: R. -0.50 Sphere. ...L. -1.25 sphere. .. what does these numbers mean? What diagnosis does it represent? Thanks drs...

Mypia: It means you have a low degree of nearsightedness or myopia. It is not dangerous and your vision can be easily corrected with part-time glasses ...Read more

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Can you tell me what my eye glasses prescription means?

Can you tell me what my eye glasses prescription means?

It's a math formula: The prescription tells the lens maker how to shape the lens (glasses, contacts) that will best correct your vision. The first number is the amount of nearsightedness (-) or farsightedness (+) to be corrected. The next number is the amount of astigmatism to treat and the number after the "x" is the angle of the astigmatism to be treated. ...Read more

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My eye glasses prescription is -3.25... Does that mean it would be same if I order contacts?

My eye glasses prescription is -3.25... Does that mean it would be same if I order contacts?

Yes.: -3.25 would be the power of the contact lens. Assuming you are wearing a soft lens, You also need the other parameters which include the type of contact lens, the base curve and the diameter ...Read more

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My glasses prescription is the following: sphere (-10.0), cylinder (-2.0), axis (176). For tax purposes, I need to know if this characterizes someone as legally blind. Not sure if this is 20/200?

My glasses prescription is the following: sphere (-10.0), cylinder (-2.0), axis (176). For tax purposes, I need to know if this characterizes someone as legally blind. Not sure if this is 20/200?

No: Legal blindness is determined and classified as vision with correction. 20/200 is one of the criteria and classification for legal blindness, but this is determined after you put you glasses on. ...Read more

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Hi! I have 25 years and I have an 0.50 astigmatism. I have a cylinder glasses prescription. Should I wear them or not?

Hi! I have 25 years and I have an 0.50 astigmatism. I have a cylinder glasses prescription. Should I wear them or not?

When driving: Yes, wear the glasses when driving and any other time that you would like to see better. Also, wearing the glasses may prevent eye strain if you have any. I agree that the prescription is small, but sometimes a little bit better vision prevents a car accident. ...Read more

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I'm 43 and feeling eye strain lately. My prescription in both eyes: sphere +25, -.50 cylinder, od axis 85, os axis 105 with a +1.00 add. Will glasses help?

I'm 43 and feeling eye strain lately. My prescription in both eyes: sphere +25, -.50 cylinder, od axis 85, os axis 105 with a +1.00 add. Will glasses help?

Small numbers: These figures indicate a very minor degree of distance correction. You are at an age when near vision is an issue and might need correction at near. Is your strain from reading? And near vision? If it is generalized, then check with your ophthalmologist for evaluation. ...Read more

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What is my eye prescription? Explain the numbers please

Translation: Od = right eye; os = left eye; sphere = basic power which is a + or - number; cyl = astigmatism power ; axis = the orientation of the cylinder; add = how much extra for near vision in bifocals; prism = prism power (not common) these are the basic numbers - there is no direct correspondence between these and the acuity (20/20 or so). Contact lens prescriptions are different. ...Read more

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What is the maximum rate at which an eye prescription change?

What is the maximum rate at which an eye prescription change?

Depends: Normally, the glasses prescription in an adult changes slowly.
There are some conditions like elevated or reduced blood sugar levels that can change your prescription rapidly. Also, there are some pathologies that cause elevation or recession of the retina and change your prescription.
If you feel your prescription may have changed, see your specialist eye md (ophthalmologist). ...Read more

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Can an eye prescription of -0.5 and 180 deg be corrected naturally?

Could: 180 degree with -0.50 (+0.50 @90) means you have with the role astigmatism. As we age the eye lid gets heavier and changes the cornea and eventually the person will have against the role astigmatism -0.50 @90 or +0.50@180). This means with age the astigmatism will balance off. ...Read more

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Does one need an updated eye prescription to purchase glasses/contacts?

Does one need an updated eye prescription to purchase glasses/contacts?

Yes: Most practioners require an eye exam, refraction and contact lens fitting be done annually in order to receive a contact lens prescription. For glasses, many optical shops will not fill a prescription that is over 6 months old. ...Read more

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If I had 20/200 with myopia, what would my eye prescription be?

If I had 20/200 with myopia, what would my eye prescription be?

Can't answer: An eyeglasses prescription is a complex set of measurements. There are several combinations of these measurements that correct someone who is 20/200. ...Read more

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Couldyour eye prescription change depending on which opticians you visit?

Couldyour eye prescription change depending on which opticians you visit?

Eye glass prescrip: Yes. Objective and subjective measurements vary but generally are consistently close. Sometimes prescriptions appear to be different, but are actually the same by way of writing them out in a transposed format. ...Read more

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Can you help? Is -4.25 a bad eye prescription?

Can you help? Is -4.25 a bad eye prescription?

Myopia: Not a good or bad prescription, just what your prescription is. It means you are moderately near-sighted and will need glasses or contact lenses to correct your distance (far) vision. ...Read more

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Can you tell me is -4.25 a bad eye prescription?

Moderate myopia: -4.25 is considered mild to moderate myopia. It means you are near-sighted. You may be eligible for a corrective procedure like lasik.
Just to understand - I have had patients with prescriptions as high as -20.0. ...Read more

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How often do I need to check if my eye prescription has changed?

Every year or two: Most adults between ages of 20 and 60 will typically need to see if their glasses rx has changed at least every two years, more often if they have symptoms of blurred vision, difficulty seeing road signs, tv, or reading. Children less than 16 should be seen yearly as they are more likely to show rapid changes. Adults after 60 should be seen yearly because of the higher chance of eye diseases. ...Read more

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Would it be best to wear a slightly weaker or a stronger eye prescription?

Neither: Wearing the wrong prescription, whether weaker or stronger, can give you dizziness, headaches, and fatigue. It does not make your eyes weaker or stronger. ...Read more

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Is +.50 a stronger or weaker eye prescription than +.75? Last exam I was +.75, today I was given +.50.

Is +.50 a stronger or weaker eye prescription than +.75? Last exam I was +.75, today I was given +.50.

Weaker: Your prescription is a measure of farsightedness, & the larger the number, the stronger the farsighted prescription. So your recent prescription went down a 1/4 of a diopter of power. This does not represent a large change. ...Read more

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I wear glasses (prescription) but only whn my eyes still constantly hurts in the sun watching tv etc vwey sensitive. Would you recommend contacts?

I wear glasses (prescription) but only whn my eyes still constantly hurts in the sun watching tv etc vwey sensitive. Would you recommend contacts?

Dry eye treatment: Artificial tears, ointment at night, low dose topical steroids, restasis, punctal plugs, and others are treatments for dry eye. Your symptoms sound consistent with dry eye. ...Read more

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Do I have to get a new eye prescription to get glasses every time I want new glasses?

Do I have to get a new eye prescription to get glasses every time I want new glasses?

Depends: If your vision has changed since the last time you got glasses, you'll certainly want to be examined to get a new prescription. If you just want a different style frame/lens shape, the glasses providers can read your prescription from current glasses & adapt it to new frames /lenses of your choice. Still a good idea to have yearly eye exam to check for glaucoma, cataracts, macular degeneration…. ...Read more

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For eyes, is the "axis" on the eye prescription different from the "axial length" of the eye?

For eyes, is the "axis" on the eye prescription different from the "axial length" of the eye?

Axial length & Axis: The axial length of the eye is the distance between the anterior and posterior poles of the eye. The Axis is a number which anywhere between 0 and 180 degrees which reveals the orientation of an astigmatism. ...Read more