What Is Astigmatism?

Image of family wearing glasses.

Astigmatism is an extremely common eye condition that affects both children and adults. It occurs when there is an imperfection in some part of your cornea, the clear tissue that covers your iris. Light rays pass through the cornea as they travel to the retina, a thin layer of cells at the back of your eye. The retina turns light rays into impulses that are transmitted to your brain, which interprets them as images.

Normally, the cornea is completely round. If you have astigmatism, some parts of your cornea may be rounder than others, which can cause a distortion in the way light rays focus on your retina. Astigmatism is considered a refractive error because it affects the way your eyes refract, or bend, light. It often occurs in conjunction with other refractive errors, such as nearsightedness or farsightedness.

Symptoms of Astigmatism

Common symptoms of astigmatism include:

  • Blurred or distorted vision
  • Trouble seeing clearly when driving at night
  • Squinting
  • Eyestrain
  • Headaches

If you have a mild case of astigmatism, you may not notice any changes in your vision.

Diagnosing Astigmatism

Many of the symptoms of astigmatism, such as blurred vision and eyestrain, can also occur if you need glasses or you already have glasses or contacts, but your eyes have gotten worse. Luckily, astigmatism can be easily spotted during an eye examination.

During the examination, your visual acuity will be measured based on your ability to read letters or numbers on an eye chart. The focusing power of your eyes will also be determined, and an instrument called a keratometer may be used to measure the curvature of your cornea. These tests help eye care professionals determine if you have astigmatism.

Treating Astigmatism

Eyeglasses will help improve your vision if you have been diagnosed with astigmatism. Although you probably will not be able to notice any difference just by looking at your new glasses, a subtle change in your lenses will allow you to see better. Glasses improve vision in people with astigmatism because the lens power is increased in a small area of a lens to compensate for the imperfection in your cornea. Some people with astigmatism feel that contacts offer better vision than glasses, but either option will help improve your eyesight.

Reshaping the cornea can alleviate astigmatism temporarily or permanently. Special contact lenses that are worn overnight change the shape of the cornea, allowing you to see clearly during the day. However, if you stop wearing the lenses at night, your symptoms will return. Two types of laser surgery, LASIK and photoreactive keratectomy (PRK), permanently reshape the cornea but may have associated risks.

Helping you make the most of your vision is our priority. If it's been awhile since we have seen you, call us today to schedule an appointment.

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Testimonial

Reviews From Our Satisfied Patients

    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.

    Chelsey K.

    By far the best experience I've had. She took her time to know me, and I received education about my eyesight, and choices I had. The modern technology showed me my options with a prescription and without. The office was on time, professional and inviting. The best for the entire family.

    Linn M.

    Dr. Krywko listens and identifies the issues with the eyes! I don’t feel like a number - the time was spent to understand what issues I was having and a comprehensive solution developed! I followed Dr. Krywko from her previous location as she’s THAT good! The team she has surrounded herself with is top notch as well! (Thank you Liz)

    Cat W.

    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!

    Anna G.

    Being new to this state, I can honestly say this is the best eye doctor and I made a good decision coming here. They took the time and patience to help!

    -Katie C.