Astigmatism

Astigmatism 2012-10-31T19:32:48+00:00

What is Astigmatism?

  • Astigmatism is a vision condition that leads to blurred vision at any distance
  • In an astigmatic eye, the cornea or the lens have an irregular shape
    • This irregular shape prevents light entering the eye to focus properly on the retina. Light focuses on two different areas of the retina

What are the Symptoms of Astigmatism?

  • Blurred/Distorted vision
  • Headaches and eye strain

How Common is Astigmatism?

  • Astigmatism is very common in the United States.
    • Most people have some degree of astigmatism
      • Usually small amounts do not interfere with normal vision and require no treatment
      • Larger amounts can significantly alter vision and lead to other associated problems such as headaches
  • Astigmatism commonly occurs with other vision conditions such as myopia or hyperopia

What Causes Astigmatism?

  • It is believed that most astigmatism is genetic
    • Astigmatism can also result from injuries or surgeries on the eyes and from increase near work
  • Often times, doctors will use the analogy of a basketball versus a football to explain astigmatism
    • A normal eye has a round shape like a basketball while an astigmatic eye takes on a shape more like a football with different curvatures along the surface of the cornea or lens

When does Astigmatism Occur?

  • Astigmatism is usually present at birth
    • It can increase or decrease over time or with the onset of certain diseases

How is Astigmatism Diagnosed?

  • Diagnosing astigmatism begins with a comprehensive eye exam at┬áDucklo EyeCare
    • During this exam, your doctor uses tests such as visual acuity and machines such as a phoropter and keratometer to determine the degree of astigmatism
    • Sometimes, it may be necessary for your doctor to use eye drops to evaluate the health of your eyes more thoroughly

How is Astigmatism Treated?

  • Eyeglasses
  • Contact Lenses
  • Orthokeratology
  • Refractive Surgery