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General Description

It is a vision disorder that causes the image to be blurred in the retina by distorting the shape of the cornea, the foremost layer of the eye, and not refracting the light correctly. It can affect the way light travels to the retina or refracts. This causes impaired vision or unclear, blurred vision.

What are the reasons of astigmatism?

Astigmatism can be caused by genetic or congenital reasons. It can be congenital or can be caused by diseases, infections and traumas that can cause changes in the corneal layer. People with astigmatism may see the shapes dispersed and the edges elongated at the point they look at.

Another effective cause of astigmatism can be a blow to the eye or an eye operation.

One of the most important causes of myopia and myopic astigmatism is keratoconus disease.

One of the most important causes of myopia and myopic astigmatism is keratoconus disease.

Astigmatism does not show a significant increase or decrease over time like myopia. Usually it proceeds in the same run. Astigmatism is divided into two groups. Astigmatism can also be categorized according to other accompanying refractive errors.

Myopia → astigmatism (astigmatism and nearsightedness problem) and Hyperopia → astigmatism (astigmatism and close vision problem)

In regular astigmatism, the image is formed as two lines perpendicular to each other in two separate planes, while in irregular astigmatism, we see that there are many focal lines instead of two perpendicular meridians. Therefore, visual acuity is severely reduced in irregular astigmatism. It cannot be completely corrected with glasses.

What are the Symptoms of Astigmatism?

Although the symptoms of astigmatism differ in everyone, generally people with astigmatism may have blurred or shadowy distance or near distance vision. Some people with astigmatism may not have symptoms. Images are never clear.

The most common symptoms in people with astigmatism;

  • Blurred vision
  • Impaired vision
  • Difficulty in vision when driving at night
  • Eye strain after prolonged reading or focusing on something
  • Squinting eyes
  • Eye irritation
  • Headache
  • Shadow vision

These symptoms of astigmatism can make your daily life difficult.

Some symptoms may be caused by other health or vision problems. Do not neglect to consult an ophthalmologist to be sure.

How to Treat Astigmatism?

Astigmatism can be detected by a general eye examination. Astigmatism can be treated with glasses, contact lenses or refractive surgery (laser or intraocular lens).

For all severe cases of astigmatism, doctors may recommend refractive surgery. In this type of surgery, lasers or small blades are used to reshape the cornea to permanently correct astigmatism. The three common types of surgery for astigmatism are SMILE, No Touch, LASIK, i-LASIK, and PRK.

There is no guarantee of 100% zero number after laser operation, but approximately 95 out of 100 people with laser for astigmatism and myopia can see fully without glasses or contact lenses.


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