Astigmatism is a common vision problem that can cause blurry or distorted vision. It occurs when the eye is not shaped correctly, making it difficult for light to focus properly on the retina.
What Is Astigmatism?
Astigmatism happens when the cornea (the clear, dome-shaped surface at the front of the eye) or the lens inside the eye is shaped more like a football rather than a round ball. This irregular shape causes light to enter the eye at different angles, leading to blurry or distorted vision. Astigmatism can affect both near and far vision, making everyday tasks like reading or driving difficult.
What Causes Astigmatism?
Astigmatism is usually present from birth, but it can develop at any age. The main cause is the irregular shape of the cornea or lens. Some common reasons for astigmatism include:
- Genetics: Astigmatism often runs in families, so if your parents have it, you may be more likely to develop it.
- Eye Injuries or Surgeries: Trauma to the eye or previous surgeries, like cataract surgery, can lead to astigmatism.
- Keratoconus: A condition where the cornea becomes thinner and bulges, causing worsening astigmatism.
Symptoms of Astigmatism
The symptoms of astigmatism can vary depending on its severity, but some common signs include:
- Blurry Vision: You may have difficulty seeing clearly at all distances.
- Squinting: You may find yourself squinting to see better, especially when reading or looking at distant objects.
- Eye Strain or Fatigue: Prolonged reading or using screens may make your eyes feel tired or sore.
- Headaches: Frequent headaches can result from eye strain caused by trying to focus.
- Difficulty Seeing at Night: Astigmatism can become more noticeable in low-light conditions.
How Is Astigmatism Diagnosed?
Astigmatism is easy to diagnose with a comprehensive eye exam. During the exam, your doctor will:
- Test Your Vision: You will be asked to read from an eye chart to see how well you can focus.
- Measure the Shape of Your Cornea: Your doctor may use a special instrument called a keratometer to measure the curvature of your cornea.
- Refraction Test: This helps determine the exact prescription you need to correct your vision.
Treatment for Astigmatism
Astigmatism can usually be treated with glasses, contact lenses, or in some cases, surgery. The most common treatment options include:
- Eyeglasses: Special lenses are designed to correct the shape of your cornea, allowing light to focus properly on the retina.
- Contact Lenses: Toric contact lenses are made specifically for astigmatism and can provide clearer vision than regular lenses.
- Refractive Surgery: For a more permanent solution, surgeries like LASIK or PRK can reshape the cornea and reduce or eliminate astigmatism. These procedures are safe and effective for most patients.
- Orthokeratology: This involves wearing special contact lenses overnight that temporarily reshape the cornea. While it isn’t a permanent solution, it can help reduce astigmatism.
Astigmatism is a common but treatable condition that can cause blurry or distorted vision. With the right treatment, you can see more clearly and comfortably. If you think you may have astigmatism or if you’re experiencing vision problems, don’t wait—schedule an eye exam at Yeshass Nethralaya Eye Hospital today.
Let us help you get the clear vision you deserve!