Doctor insights on:
What Does Cylindrical 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
What does cylindrical power actually means? And what is the best laser vision correction of today?
I have a cylindrical power of 2.5 in 2014. Now it was 3. Why it get increased? Will it be a problem?
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
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
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
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
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
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
How long do I wait to get adjusted to a new pair of spectacles? I have hypermetropia, recently my cylindrical power changed by 0.25
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?
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
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
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
Is it necessary to have a constant cylindrical power in both eyes before doing zyoptix operation?
Yes: You want to be sure your sphere and cylinder is stable and unchanging before undergoing any refractive procedure. ...Read more
I have cylindrical power of -0.5 (both eyes) and axis 90 on right and 85 on left. What are the corrective measures I need to follow?
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
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
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?
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
Can you please explain what this eye prescription means? 0.D. Cylinder -0.25 axis 90 o.S -0.50 axis 75?
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
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
My son is 5yr & both eyes has -1.50 cylindrical power. Right eye axis is 10 & left eye 175. Is Spec needed at this age or can cure through right diet?
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
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
I sometimes see floating dark spots. Vision is normal 6/12 with cylindrical lenses for correction. What is the cause? Any action needed?
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