FAQ - astigmatism
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astigmatism?


I have just astigmatism not near or far sighted
cylender is -1.0 and Axis 180. i use glasses because without them it feels blurry. I want to use the contact lenses which one i should use? i heared that if I use normal lenses of sph -0.5. they will work for me does it right?
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Where the 0.50 comes in is if you had a fairly high correction aside from the astigmatism.

If you had - 4.00 - 1.00 X 180...then adding half the 1.00 ( 0.50 )to the 4.00 may have worked...but not perfectly.

As it is, having only astigmatism , you won't get good vision with anything but a toric lens.  (+ info)

Astigmatism?


I just found out I have an astigmatism and may need glasses. I know essentially what that is as was describes by the eye doctor, but what can you tell me about it? Will I need glasses to stop it from getting worse, will it get worse, can I maybe just have sometimes glasses, how much does a prescription for a mild astigmatism go... any info would be great. Thank you in advance.
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Astigmatism may or may not get worse; it is all up to what your eyes want to do. It is more likely that it will get worse than better though, but it could happen either way. Wearing glasses or, not wearing them, will not influence what your eyes do.
If you have a very mild astigmatism, you are not alone: many people go on each day without it being corrected. But, if you have the opportunity to correct it, why not? It will surely make your vision crisper, and if you play sports it will help a great deal as well!
A mild astigmatism is somewhere between -0.25 and -1.00. Usually -0.25 can easily go uncorrected, but anything -0.50 and above will likely make a difference in your vision.
I suggest getting the correction. It will put less strain on your eyes, and the world will look much clearer to you. And if you don't like the idea of glasses, contacts can comfortably be worn by people with astigmatism too!  (+ info)

What exactly is an astigmatism and will I eventually need glasses if it is now just mild?


I am almost 14 and today the eye doctor said I had a slight astigmatism. He said not to worry about it, but will I eventually need glasses? He said something about straining my eyes to read computer screens and texts on my phone. I am constantly on the computer and texting. So glasses? No glasses?
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Astigmatism is only a slightly specialised version of short or long sight.
It is not a disease, or anything peculiar.
It's a quantity, not an object. (As in "some milk", not "a milk.")

Every eye has some astigmatism if you measure accurately enough, but in many people it's not enough to show up in their Rx.

It is not an irreularity of the cornea, as some textbooks and website wrongly repeat.
(There is actually a term "Irregular astigmatism" to cover those odd cases where it is!)

As it is a version of short or long sight it is about as likely to change or stay the same as you grow as any other Rx component. (Probably a little less, statistically.)

If you are putting more effort into fine near vision than seems comfortable, an Rx just for fine and demanding activities may be useful.
You won't save or wreck your eyes either way. They will do whatever they were going to do. We are talking "handy", here, not "Need" with a capital N.  (+ info)

What is astigmatism and how does it affect vision?


Some one I knew said that with astigmatism the world looks curved in a way and that in the corner of the eye things appear stretched out. My doctor told me though that I can see clearly out of the corner of my eyes and my forward view is just a bit blurred. So how is the world really perceived with astigmatism? Can somebody explain this vision for me?
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umm...i believe when you have astigmatism it will look blurry left, right, and center, near or far. that's because astigmatism is usually caused by a problem in your cornea, which covers the lenses of our eyes, which in turn focuses images on our retina and gets transmitted to the brain.

so if there's a problem with the cornea, everything else gets affected.  (+ info)

What is the difference between regular and irregular astigmatism?


Can someone please explain what the difference is between regular and irregular astigmatism is? I have a presentation about astigmatism for my anatomy and physiology class but I don't really understand the online definitions and so I would appreciate it if anyone could explain. Thank you!
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Regular astigmatism means that the persons cornea has one meridian steeper than the meridian 90 degrees away from it. We often describe it as looking like the side of a football but it is actually a section out of a geometric solid called a torus. That is why contacts for astigmatism are called toric. Regular astigmatism can be corrected with glasses, soft lenses, rigid lenses or refractive surgery. The surface of a cornea with regular astigmatism could be described by a mathematical formula.

Irregular astigmatism is any other shaped cornea besides a sphere or what i described as regular astigmatism. Some causes of irregular astigmatism are keratoconnus, a condition where a cone develops on the cornea, trauma and corneal transplants. People with irregular astigmatism often must wear rigid contact lenses to see well. The front surface of the contact replaces the front surface of the eye and the space between the eye and the lens fills with tears making up part of the prescription.

Astigmatism just means that light does not focus at a point.  (+ info)

What's the difference between Myopia and Astigmatism. Can you have astigmatism without having myopia?


I just got a prescription for glasses because I have a mild astigmatism in both my eyes. Does that mean I'm nearsighted as well because distances are blurry for me? When I wear my glasses to read I get kind of dizzy - should I just use them for distances?
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to read your prescription it would show a number such as this:
-1.25-.50 x140.....The first number represents the power needed to bring far objects closer. This is known as the sphere. The second number is called the cylinder. Any time you have a cylinder it means there is an astigmatism present. The last number is the axis. The axis is the direction by which light will pass through the lens so that objects will come into better focus. When you have the first number only ,then you have simple myopia. The negative sign is representing nearsightedness. Had it been a plus sign it would be farsightedness or hyperopia. When your prescription is compounded with the second and third number then it means astigmatism.  (+ info)

What happens if you have very high astigmatism?


How high can astigmatism go?

When it becomes very high, what is the danger? For example, at high risk of getting certain eye problems/diseases etc..

Can it be corrected through lifestyle changes?
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I'm not an eye professional, but: I believe that a majority of people who go to an optometrist will find they have some astigmatism, probably around 0.25 to 0.5 diopter. If that's all you have, you probably won't care much. The minimum they bother to go after with contact lenses is 0.75D. Up to around maybe 2D is probably "normal" astigmatism, and up to 4 is "kind of a lot". There are diseases of the eye that can cause huge amounts, like 10D. I think astigmatism is more likely the symptom of an eye condition, not the cause.

As for lifestyle changes, I don't think there is solid information from studies. People talk about excessive eye rubbing or squinting as potentially leading to more astigmatism. I've read papers that suggest habitually looking to the side or with your head tilted may be causal factors. I suffer from astigmatism and am disappointed at the apparent lack of interest in finding out what, if any, outside factors may cause it - besides plain old genetics. It has definitely been documented that people with eyelid issues (bumps that put pressure on the eye) can develop astigmatism that later goes away when the eyelid problem is resolved. So not everyone is simply suffering from a genetic flaw.  (+ info)

If I have astigmatism and want to buy circle lenses but not buy toric lenses, what should I do?


I heard from a friend that you just add 1 on your prescription? For example, my prescription is -6.00 with astigmatism do I just put down -7.00 as it instead? Or something?
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If you wear the circle lenses that do not have astigmatism correction when you normally have it, then you will not see as well. If they are just for a special occasion then you should be ok. If you are trying to compensate for the astigmatism, then you need to add half of your cylinder power to the spherical number. Example if you have a cylinder power of -1.00 then you would add -.50 to the sphere. If you end up with a number that is between spherical powers, then go with the lower number.

If in doubt ask your doctor.  (+ info)

Why do people with astigmatism have to get clear lenses?


Yes I have astigmatism & I heard that you can only get clear contact lenses. I want to know why?
And what if I wanted to get a box of colored ones too,would they work or no?


And by clear lenses I ment the ones for astigmatism.
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It's a mass market thing... Contacts become cheaper (and easier to market) when any particular version (power/material/fit/colour) can be sold in thousands and thousands.

But an astigmatic lens not only has an extra power, it has a particular axis direction. That divides up the potential market drastically and dividing that by a set of colours makes it worse by a factor of three, four, five...
Outside a limited range of fits, colours and astigmatic powers, it's not likely to be commercially viable.

Depending on the amount of your astigmatism, your prescriber may be able to suggest a compromise spherical Rx that would give you "good enough" vision for social occasions such as parties, which could be done in coloured contacts.


Personally I'm old-fashioned: I tend to prefer a person's natural eye colour, whatever it is.
And I've looked at an awful lot of eyeballs.  (+ info)

Can you become a pilot if you have astigmatism?


I know they say that you cant become a pilot if you have high degrees on both eyes but how about low degrees but with moderate astigmatism. Any information will help. Plus i would also like to know if Lasik can cure astigmatism or if wearing glasses regularly wil improve the condition?
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Hey check out this site....!

http://www.improvingmyeyesight.com/rebuild.html

The site offers a program of eye exercises to improve your vision. Actually, the creator of the program, Orlin Sorensen, had a very similar situation like you... he wanted to be a pilot, but didn't have 20/20 vision. You can read his story on the site.

My vision is 20/400, which is really poor. I recently started doing the exercises to try to improve my vision. I created a blog where I record my progress with the exercises.

I recently saw some improvement. Other people (who have also experienced improvements) have posted comments about their experiences as well. You can check it out at: http://improvingmyeyesight.com/blog

Hope this helps....  (+ info)

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