Astigmatism

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Astigmatism
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Astigmatism

• Astigmatism is a refractive error of the eye. It
  occurs when light that enters the eye is not
  focused evenly onto the retina. Instead, the
  light is focused either in front of the retina or
  behind, resulting in vision that may be blurry
  for either near or far vision or, for all
  objects.

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Causes of Astigmatism

• The cause of astigmatism is not known.
  Astigmatism is known to be the result of the
  following
• Heredity
• Cataract surgery
• Curvature of the cornea
• Length of the eye
• Distortion of the lens of the eye

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Diagnosis of Astigmatism

• The diagnosis of astigmatism is confirmed with a
  routine eye examination. If the patient is a
  child, a test that measures reflected light,
  known as a retinoscopy, is performed.

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Symptoms of Astigmatism

• The severity of symptoms may depend on the
  degree of astigmatism in the eyes. Some of the
  symptoms of astigmatism include
• Headache
• Squinting
• Distorted or blurry vision
• Poor night vision
• Eye strain
• Inability to focus on fine details

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Treatment of Astigmatism

• Once diagnosed, astigmatism can usually be
  corrected with either one of the following
• Prescription eyeglasses
• Contact lenses
• Refractive surgery

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