Search Menu
Search entire library by keyword
Choose by letter to browse topics
A B C D E F G H I J K LM N O P Q R S T U V W X Y Z 0-9
(A-Z listing includes diseases, conditions, tests and procedures)


What is astigmatism?

Astigmatism is a relatively common condition in which an abnormally shaped cornea or a curvature of the lens causes problems with the ability to focus. Astigmatism is one of several conditions called refractive errors because it involves the eye’s inability to refract light properly. The other refractive errors, which can occur together with astigmatism, are nearsightedness (myopia) and farsightedness (hyperopia). Astigmatism is usually present at birth.


  • Problems with focusing and seeing finer details
  • Blurred vision
  • Headaches


A standard eye exam is usually all that is needed to diagnose astigmatism. In younger children who cannot answer questions about their vision a test called retinoscopy can be used.


  • Glasses or hard contact lenses that can help reshape the curved cornea
  • Laser surgery, depending on the individual case

When to Call for Help

If your child experiences any of the above symptoms, consult an ophthalmologist.

Find a physician at another Johns Hopkins Member Hospital:
Connect with a Treatment Center:
Find Additional Treatment Centers at:
woman holding pill case

Johns Hopkins Home Care

We provide high quality, individualized care for patients of all ages where you feel most comfortable – your home or community. Our services and equipment are designed to help you regain and retain a level of independence.

Learn More