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Astigmatism

What you see?

Blurry vision. An astigmatic eye has a cornea that is irregularly shaped or irregularly curved lens inside the eye, light fails to come to a single focus on the retina to produce clear vision.

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Symptoms of astigmatism
  • Can exist in combination with nearsightedness and farsightedness
  • Objects both near and far are blurred or distorted producing an effect similar to looking through a pane of wavy glass
  • Constant squinting of the eyes
  • Inability to read small print
  • Difficulty driving at night
Causes of astigmatism

Because of an irregular shaped cornea:

  • Light is correctly focused along one axis, but incorrectly along the other
  • Light entering the eye is not focused on a single point on the retina
What to do
  • Astigmatism can be diagnosed by an eye care professional through a variety of tests, including a simple vision test, light refraction test, cornea measurement, or electronically mapping the surface of the eye
  • The uneven distribution of light is corrected by refocusing light rays on a single plane, this is done in a number of ways:
    • Spectacles
    • Contact lenses – are uniquely designed to meet the special vision correction needs of people with astigmatism
    • Surgery – Astigmatic Keratotomy is performed through LASIK laser technology (photorefractive keratotomy) or by manual incisions (radial keratotomy), this procedure reshapes the cornea by removing small pieces of tissue from the cornea

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