Best Cheap Site To Buy Fashion Frames Without Prescription Understand Your Astigmatism Better

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Understand Your Astigmatism Better

The word “Astigmatism” is often mispronounced, misunderstood – or simply not understood at all. However, of those who wear glasses, a large majority actually suffer from some form of astigmatism. So why don’t we know what it is? It’s actually quite simple once you learn a little more about it. Our eyes are typically shaped like a round ball; however, with an astigmatism, the eye is elongated – more like a football. Having an astigmatism does not mean that there is a problem with the health of one’s eyes; simply that, due to interactions with light, the eye has trouble focusing correctly. Instead of the light entering a central location and marking it with clear vision, it appears from several viewing angles – both in front of and behind the retina.

There are several different kinds of astigmatism, and they can be broken down in a few different ways: myopic astigmatism, hyperopic astigmatism, and mixed astigmatism, and regular and irregular astigmatism. Like myopia in vision, myopic astigmatism affects the meridians of the eye in a myopic way; that is, light is brought into focus in front of the retina. Hyperopic astigmatism – like farsightedness – affects your near vision and light is brought to focus behind the retina in one or both eyes. A mixed astigmatism is a combination of the two, in each eye. An irregular astigmatism cannot be corrected with glasses, but can be corrected with contact lenses. Regular astigmatisms typically align the meridians perpendicular to each other and cause that football shape.

If you look at your prescription, you can very easily know if you have an astigmatism or not. Typically, you will see the SPH, or your “sphere”; these values ​​are used to know your vision correction needs. However, if you have additional information under the CYL (or cylinder) and axis section, you will know that you have an astigmatism. The cylinder tells you the correction for the astigmatic refractive error; and the value is added or subtracted from cylindrical on the meridian depending on your needs. The axis tells you where to place the cylinder. These two values ​​always come together; it is not possible to get a CYL on your prescription without Axis.

The next time you have your eyes tested, there’s no doubt that your doctor will probably give you an astigmatism test as well. Whether you need single vision lenses or bifocal glasses, it may be the case that you also get an astigmatism correction. Correcting an astigmatism should not cost more than already receiving prescription glasses, since the most important change is the placement of the lens within the frame. Only if you have a very high astigmatism will the price of your glasses change significantly. But if you’re being charged more to add an astigmatism, or just feel like your glasses are too much, you should definitely check out some glasses online; you will be sure to find great glasses at a fraction of the price!

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