Astigmatism

the word astigmatism in bold

A normal cornea — the clear front covering of your eye — has a round curve, like a basketball. However, many people have an irregularly shaped cornea while others have an irregularly curved lens. Both cases can cause light that enters the eye to bend the wrong way, causing blurry vision. This disorder is called astigmatism.

If an abnormally shaped cornea is causing your astigmatism, it’s called corneal astigmatism. Lenticular astigmatism is the term used for astigmatism caused by an irregular lens.

If you have corneal astigmatism, your cornea is shaped more like a football. The curvature of your cornea is probably uneven, with some areas being flatter or steeper than other areas.

Often, astigmatism occurs in conjunction with other vision conditions, such as farsightedness or nearsightedness. All three of these conditions involve errors in the way the cornea and lens refract, or bend light.

Causes

Both children and adults can suffer from astigmatism. In minor cases, they may not even notice a change in vision. While this condition is usually present from birth, it can change over time.

Astigmatism may also develop after eye surgery or an injury. In rare cases, a condition called keratoconus causes astigmatism. This means the cornea becomes thinner and more cone-shaped over time, leading to increasingly poor vision.

Diagnosis

When you get a comprehensive eye exam, your doctor tests for astigmatism. She or he will measure how your eyes focus light. To determine the curvature of your cornea, the doctor uses an instrument called a keratometer. It focuses a circle of light on the cornea. This allows your doctor to measure the reflection and determine the proper fit of contact lenses, if you opt for this treatment option. If your doctor wants even more details, she or he can use a special video camera to map your cornea’s surface. Other instruments measure how your eyes focus light.

Treatment

Wearing eyeglasses is the safest and simplest way to treat astigmatism. Both glasses and contact lenses correct this disorder by altering the way light enters the eyes.

Orthokeratology is a non-invasive procedure involving a series of rigid contact lenses. Worn under your doctor’s careful supervision, you can use these to gradually reshape your corneal curve. However, if you stop wearing these specially designed lenses, your corneas will return to their former shape.

Refractive surgeries, such as LASIK and photorefractive keratectomy (PRK), change your cornea’s shape by using a laser to remove a tiny amount of corneal tissue.

If you suffer from blurry or elongated vision, you might have astigmatism. Call us today so we can schedule an exam and get you on the road to clear vision.

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Testimonials

  • I have worn contact lenses for years but due to my strong near-sighted prescription with high astigmatism could get neither the comfort nor vision very good in standard gas permeable lenses or in soft lenses. I had reverted back to wearing glasses most of the time until Dr. Krywko recommended the SynergEyes lenses. They work great for me and I can finally wear contacts again! Thank you, Dr. Krywko!

    ...
    Show More - Anna Garity
  • Dr. Candria Kryko is a wonderful OD. I was seen by Dr. Kryko in Scottsdale recently for an eye exam/contact lens fitting. She is extremely pleasant, attentive, and she took her time to give me a thorough exam and answer all of my questions. Dr. Kryko gave me recommendations on contacts and eye drops, as well, she gave me tips on how I can save on some of my contact expenses. She was professional, attentive, took the time to explain what was needed, and was simply nice to be around. I recommend Dr. Kryko. 

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    Show More - Chelsey Kerchansky
  • My entire family have been seeing Dr. Krywko for years. The professionalism, care and focus are over the top. I was told by an optician I would not be a likely candidate for contact lenses. However with Dr. Krywko's patience and wisdom she was able to fit me for contact lenses that work perfectly! I am thrilled..........Plus, I also have the most gorgeous frames (when I do not want to wear my contacts. ) I receive comments every time I wear them, " where did you get your glasses!" Dr. Kryko just received the newest styles......I'm in trouble..........

    ...
    Show More - Trish Nielsen

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