Doctor insights on:
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.See 1 more doctor answer
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.
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.See 1 more doctor answer
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.
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.
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.
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.
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
1-2 weeks: You should wear only your new glasses. If you are not adjusted to them in 1-2 weeks, return for evaluation.
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.
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?
Vision correction: With that prescription, you need some of correction such as glasses, contacts, or surgery. The glasses will be pretty thick though.
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