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Doctor insights on: What Does Cylindrical Power Mean

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What does cylindrical power mean?

What does cylindrical power mean?

Astigmatism: If the front of the eye or the internal lens is not a perfect sphere and is slightly oval, it may require special correction in one direction. This is referred to as cylindrical power necessary to correct the ovalness. It is also referred to as the astigmatism of the eye.

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What does -2.5 cylindrical lens power mean?

What does -2.5 cylindrical lens power mean?

Astigmatism: This refers to an ovality of the optical focusing elements of the eye. It is measured by the difference between the steeper and less curved axes and for the prescription mentioned about, that difference is 2.5 diopters which would be incorporated in a corrective lens.

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What does cylindrical power actually means? And what is the best laser vision correction of today?

What does cylindrical power actually means? And what is the best laser vision correction of today?

Oval eye: Cylinder power (astigmatism) refers to an ovalness of the eye which must be corrected by a reverse oval in the eyeglasses or contacts. This usually can be corrected with lasik and the machines in use today are fourth generation and quite excellent.

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Will cylindrical power disappear as we grow up?

Cylindrical power?: Not sure what you mean by "cylindrical power". Please explain and resubmit question.

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I have a cylindrical power of 2.5 in 2014. Now it was 3. Why it get increased? Will it be a problem?

I have a cylindrical power of 2.5 in 2014. Now it was 3. Why it get increased? Will it be a problem?

Not a problem: Changes in refraction error are common, and going from 2.5 to 3 diopters of cylinder correction (for astigmatism) does not suggest anything more serious.

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If my spherical eyesight no. Is -1.5 and cylinderical no. Is 0.5, then what power lenses should I get?

If my spherical eyesight no. Is -1.5 and cylinderical no. Is 0.5, then what power lenses should I get?

Simple formula: Spherical equivalent=sphere+1/2 (cylinder). The sphere is the first number written in a glasses prescription. The second number is the cylinder. The third number is the axis. Keep track of your signs both positive and negative when you are adding or subtracting above. The axis plays no role in formula above. You need -1.25. Fun fact: circle of least confusion equals spherical equivalent. Google it.

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MY CHILD IS HAVING -6 CYLINDRICAL POWER SHE IS ONLY 5 YEARS. WHAT IS THE BEST REMEDY?

MY CHILD IS HAVING -6 CYLINDRICAL POWER SHE IS ONLY 5 YEARS. WHAT IS THE BEST REMEDY?

Hyperactivity: Some children are more hyperactive than others. The key is to differentiate what may be within normal range vs those who are in need for additional evaluation. One way is to see if the child is doing what is expected of her at this age e.g. Normal eating sleeping and listening to your commands and not getting into danger areas to get hurt or hurting others.

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My 3 yr 8 mnths boy had a -1 cylindrical power is tht necessary to wear glasses?

My 3 yr 8 mnths boy had a -1 cylindrical power is tht necessary to wear glasses?

Not necessary: If the eye (s) is otherwise normal in all other respects an there is only a 1 diopter of cylinder, than eyeglasses are not necessary. You might be being victimized by an aggressive optometrist who just wants to sell eyeglasses. Children this age should always be seen only by a pediatric ophthalmologist.

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I have -5.5 spherical and -.5 cylindrical power with axis 10, what should be my contact lens power?

I have -5.5 spherical and -.5 cylindrical power with axis 10, what should be my contact lens power?

Contact lens fitting: You really need to be properly fitted for contacts. For contacts, you not only need the power, but you also need the diameter of the contact lens and a base curve. Both these two numbers describe the shape of the contact lens and you need to be evaluated to see which lens provides the best fit for your eyes. A poorly fitted contact lens may increase the risk for eye infections.

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How I can reduce cylindrical, positive and negative power for eyes?

How I can reduce cylindrical, positive and negative power for eyes?

You can't: There is no "natural" way to correct your vision. Just glasses, contacts, or corneal surgery. Sorry. Anyone who says different walks like a duck.

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I use cylindrical glasses with -1.25 power. Will it remain same for my contact lenses?

I use cylindrical glasses with -1.25 power. Will it remain same for my contact lenses?

At this power: Yes the contact lenses would be the same. But you need to have them fit with the appropriate base curve, this requires an eye care doctor to determine the fit.

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I was diagnosed with a spherical +.075 power and cylindrical -.1.90 power for both my eyes. Is that very bad?

I was diagnosed with a spherical +.075 power and cylindrical -.1.90 power for both my eyes. Is that very bad?

OnlyMeans NotPerfect: & values=the degree of magnification difference, in diopters, which examiner felt were more effective (from what you said=clearer vs. Less clear) in reading characters. The Phoropter used to arrive at values=simply an arrangement of lenses (quickly changeable glasses, if you will) used, trial & error, to rapidly check what worked best at time checked. Spherical=overall; cylinder=astigmatism.

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Cylindrical power -6.5 in both eyes, is this really bad?

Cylindrical power -6.5 in both eyes, is this really bad?

This is: A large amount of astigmatism. You should see a corneal specialist to evaluate your corneas for a ectatic disorder like keratoconus.

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Cylindrical power of -.25 in both eyes. Is this considered bad?

Cylindrical power of -.25 in both eyes. Is this considered bad?

Astigmatism: This is a nearly negligible amount of astigmatism and should not be responsible for any significant problem with vision.

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How to reduce cylindrical axis power in eye?

How to reduce cylindrical axis power in eye?

Surgery: Surgery like LASIK or PRK will correct astigmatism which is what cylindrical axis power represents. Otherwise glasses or contacts will compensate for the vision defect.

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Cylindrical power -6.5 in both eyes. What does this indicate?

This indicates: A lot of astigmatism. This much astigmatism should be evaluated for possible corneal problems. Be sure to see a corneal specialist for this evaluation.

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My son was 6 yrs old and he was told that he has -0.75 cylindrical power in both the eyes. Will it increase? How to reduce it?

My son was 6 yrs old and he was told that he has -0.75 cylindrical power in both the eyes. Will it increase? How to reduce it?

Increase likely: Your child has a mild astigmatism. This is common and is fairly stable but might change a little over time. Your child's astigmatism is low enough that for a while nothing need be done in terms of eyeglasses. Just have him checked in a year and see if it has changed.

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Really bad eye vision (11 (spherical), -2.5 (cylindrical). Does this mean I need contacts?

Really bad eye vision (11 (spherical), -2.5 (cylindrical). Does this mean I need contacts?

Vision correction: With that prescription, you need some of correction such as glasses, contacts, or surgery. The glasses will be pretty thick though.