Simulated vision corrected for astigmatism

Astigmatism, which can occur with myopia or hyperopia, is a condition in which the light entering the eye is not refracted (or bent) equally in all directions. Due to diffences in the curvature of the cornea or lens of the eye, the light has two focal points from two axes often causing blurred near and distance vision.

What Causes Astigmatism?

Light entering the eye is not focused on a single point on the retina, so objects both near and far become blurred or distorted producing an effect similar to looking through a pane of wavy glass.This curvation may be inherited or as a result of an eye injury or surgery. 

Symptoms of Astigmatism

An eye care professional may diagnose astigmatism through a variety of tests, including a simple vision test, light refraction test, cornea measurement, or electronically mapping the surface of the eye. Common symptoms of astigmatism include:

  • Objects both near and far appear blurred
  • Headaches or eyestrain
  • Constant squinting of the eyes
  • Difficulty driving at night

Treatments for Astigmatism

Since astigmatism occurs from the uneven distribution of light rays, it's corrected when light rays are focused on a single plane. This may be done in a number of ways:

  • Eye Glasses
  • Contact lenses for Astigmatism: contact lenses uniquely designed to meet the special vision correction needs of people with astigmatism. If you have astigmatism, ask your eye care professional about Bausch + Lomb ULTRA for Astigmatism contact lenses or Biotrue ONEday for Astigmatism daily disposable contact lenses.
  • Orthokeratology: a process that uses customized shaping lenses to gently correct your vision while you sleep for clear vision while you’re awake
  • Refractive Surgery Procedures: Performed through LASIK laser technology (photorefractive keratotomy) or through manual incisions (radial keratotomy), this procedure reshapes the cornea by removing small pieces of tissue from the cornea.

Treating Cataracts and Astigmatism

TRULIGN Toric IOL is an artificial lens implant that, unlike a standard IOL, can treat both a person's cataracts and astigmatism. With the TRULIGN Toric, your cataracts, astigmatism and presbyopia will be corrected, and like many patients, you’ll experience a broader range of vision that helps give you the ability to bring your world into clear, sharp focus. If you’re like many TRULIGN Toric patients, after surgery you’ll enjoy increased independence from your glasses.


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