Top
40
Doctor insights on: What Does Cylindrical Power Mean

Share
1

1
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. ...Read more

2

2
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. ...Read more

3

3
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. ...Read more

6

6
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. ...Read more

7

7
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. ...Read more

8

8
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. ...Read more

9

9
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. ...Read more

10

10
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. ...Read more

11

11
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. ...Read more

12

12
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. ...Read more

13

13
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: Focus. Values=magnification, in diopters, which examiner felt were effective to compensate focus (from what you said: clearer vs. Less clear) & better read 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 better at time checked. Spherical=overall; cylinder+axis=astigmatism. ...Read more

15

15
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. ...Read more

16

16
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. ...Read more

17

17
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. ...Read more

18

18
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. ...Read more

19

19
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. ...Read more

20

20
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. ...Read more

21

21
MY SON HE IS 3.5 YEARS OLD. HE HAS CYLINDRICAL POWER -3.25 IN BOTH EYES. HOW CAN I REDUCE THIS?

MY SON HE IS 3.5 YEARS OLD. HE HAS CYLINDRICAL POWER -3.25 IN BOTH EYES. HOW CAN I REDUCE THIS?

Myopia: Well, you cannot change your son's myopia, he has been born with it. It is very important to make certain his eyes are developing normally and that he receives the proper prescription spectacles when he needs them. To that end, make sure he sees a pediatric ophthalmologist routinely & then you can be reassured that his vision is maturing on pace with his age. A well fitted spectacle is very likey. ...Read more

22

22
My eyesight is -4 with cylinderical -1. Can it be made 20/20 by any mean. How poor eyesight can lead to blindness?

My eyesight is -4 with cylinderical -1. Can it be made 20/20 by any mean. How poor eyesight can lead to blindness?

Should be. ..: Correctable with glasses or contact lenses, or even laser eye surgery. If not correctable then there are other things going on the prevent this like a cataract or retina abnormalities. You need a good pomprehensive eye exam, this will determine what is going on with your eyes. ...Read more

23

23
What do the settings on an oxygen cylinder such as those on oxygen therapy in hospital mean?

What do the settings on an oxygen cylinder such as those on oxygen therapy in hospital mean?

Oxygen Therapy: Oxygen is most commonly delivered by flow rates such as liters per minute (l/min). Each l/min adds approximately 3% to the percentage of air that is oxygen. For example, at 2l/min the patient is receiving 6% additional oxygen. Normally, the ambient air is 21% oxygen, so this patient would be receiving 6+21 or 27% oxygen. ...Read more

26

26
Using spects since I was 11. Started wearing contacts at 17.Power now is -4, cylindrical; brstfeedin 6mnth old, can I hav a lasik/laser? When? How safe?

Using spects since I was 11. Started wearing contacts at 17.Power now is -4, cylindrical; brstfeedin 6mnth old, can I hav a lasik/laser? When? How safe?

Maybe: You should wait until you are not pregnant and not breast-feeding. See a lasik surgeon for a consultation. Most people can have lasik. ...Read more

27

27
I have given a 0.5 cylindrical power in my left eye with 20° axis. My question is should I need to wear a spects.

I have given a 0.5 cylindrical power in my left eye with 20° axis. My question is should I need to wear a spects.

Depends: If you otherwise see well enough without spectacles in with both eyes, you likely can just monitor your vision. Astigmatism tends to have more symptoms of blur of too high and especially at nighttime. 0.5 cylinder at 020 degrees axis is low order, but oblique in nature, which also tends to be more symptomatic. Have your eyes monitored. You can always wear spectacles if your vision is blurry. ...Read more

28

28
I have a cylindrical power of -0.5 (both eyes) with axis 90 on left eyes and 85 on right eyes. Is it necessary to wear my glasses all day?

Probably not: You have a mild astigmatism and at 20 years of age, are probably able to see quite well without glasses. If you get headaches when you read you might consider glasses. ...Read more

29

29
What does a sphere number of +0.50 and cylinder number of -0.25 mean (axis 179 degrees) (left eye is +0.25, -0.25, 14 degrees respectively)?

What does a sphere number of +0.50 and cylinder number of -0.25 mean (axis 179 degrees) (left eye is +0.25, -0.25, 14 degrees respectively)?

Eyeglass powers: These are small numbers and probably means the vision of this person is good without glasses. The first number (sphere) is whether a magnifying or minifying lens is needed. The cylinder is the amount of ovalness and the axis is the orientation of the oval (vertical is 90 degrees and horizontal 180 degrees and other numbers are in between). ...Read more

30

30
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

31

31
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

32

32
I have a sph power of -0.75 in left eye and -1 in right eye. My right eye also has cylindrical power of -0.5, axis 100. Should I wear glasses always?

I have a sph power of -0.75 in left eye and -1 in right eye. My right eye also has cylindrical power of -0.5, axis 100. Should I wear glasses always?

Your choice: Glasses are an optical improvement but not a medical item. If you need the clarity of vision these glasses can provide, then by all means wear them. But you do no harm living with a little blur and your powers indicate that reading should be no issue at all. Either way, the health of the eyes will not compromised. ...Read more

34

34
What is Keratoconus, I went for general eye check up have a little cylindrical power 1.75 (LE) 2.25 (RE), doctor suspected for KC worried help, me pls?

What is Keratoconus, I went for general eye check up have a little cylindrical power 1.75 (LE) 2.25 (RE), doctor suspected for KC worried help, me pls?

Examination: First of all, keratoconus is mostly a sporadic disease with an incidence of 1:2000. It is bilateral & not due to inflammatory conditions. Less frequently it's due to hereditary factors. Corneal topography is very helpful in diagnosing the condition, although other clinical signs are picked up during examination. Improving vision generally requires ridged contact lenses, although some néed surgery. ...Read more

35

35
I was told by my eye specialist that I have a cylindrical power, which is talking about what?

I was told by my eye specialist that I have a cylindrical power, which is talking about what?

Astigmatism.: Your specialist was referring to astigmatism which is a situation where your eye is not perfectly round like a basketball, but it is slightly ob-longed in one direction as in comparison to a football. This is very normal and almost every one has some amount of astigmatism, depending on how precisely you measure the difference in two different axis's. ...Read more

36

36
My cylindrical sight is 3, will it be a problem?

Need to know why: You need to know why, before one can say whether or not it will be a long term problem. ...Read more

37

37
I sometimes see floating dark spots. Vision is normal 6/12 with cylindrical lenses for correction. What is the cause? Any action needed?

I sometimes see floating dark spots. Vision is normal 6/12 with cylindrical lenses for correction. What is the cause? Any action needed?

Eye exam: Best to have any new finding checked out. A few moving dark spots typically are vitreous floaters, but could have an eye exam to rule out any retinal problems. ...Read more

38

38
Is really high astigmatism like -3 cylinder corrected by glasses or lasers?

Is really high astigmatism like -3 cylinder corrected by glasses or lasers?

Both: Optical correction for astigmatism at the -3.00 level and other levels, is available in eyeglasses, contact lenses or lasik correction. Minus three is not "really high" but just moderately high. Discuss the best correction with your ophthalmologist. ...Read more

39

39
Please advise what is spherical, cylindrical & axis according to eye prescrption?

Please advise what is spherical, cylindrical & axis according to eye prescrption?

Powers: Spherical is the basic power of how plus or minus a correction you need. Astigmatism is the ovalness of the eye and the cylinder refers to the power (how much) ovalness there is and the axis is the orientation of the ovalness (from 0 degrees to 180 degrees). ...Read more

40

40
Cylinder -3.00 left axis 175 I know I have an astigmatism but how bad is it?

Cylinder -3.00 left axis 175 I know I have an astigmatism but how bad is it?

Moderately bad: 3 diopters of cylinder is reasonably severe astigmatism. Not horrible, but not mild either. ...Read more