What is astigmatism?

Astigmatism is a common vision problem caused by an irregular curvature of the cornea or the lens. Instead of being perfectly round, the cornea or lens is more oval-shaped, like a soccer ball. This irregularity alters the path of light rays, preventing them from focusing properly on the retina, which results in blurred vision, whether up close or at a distance.

Symptoms of astigmatism:

• Blurred or distorted vision, both up close and at a distance

• Eye strain after prolonged periods of reading or working at a computer screen

• Frequent headaches

• Difficulty seeing clearly at different distances

• Excessive blinking or squinting in an attempt to see better

Causes of astigmatism:

Astigmatism can be hereditary and appear as early as childhood. However, it can also develop following an eye injury, surgery, or as a result of certain conditions such as keratoconus. Here are some common causes:

• Irregular shape of the cornea: A cornea that is slightly oval rather than round

• Heredity: Astigmatism can run in families

• Eye injuries or surgeries: Procedures that alter the curvature of the cornea

• Keratoconus: A degenerative condition that causes the cornea to gradually thin and become distorted

Diagnosis of Astigmatism

During a comprehensive eye exam, an optometrist uses specialized tests to analyze the curvature of the cornea and measurevisual acuity. These tests allow for an accurate diagnosis of the degree of astigmatism and enable the optometrist to recommend appropriate corrective solutions.

Options for correcting astigmatism

• Prescription glasses: The lenses are designed to compensate for the irregular curvature of the cornea, thereby correcting the blurred vision caused by astigmatism.

• Toric contact lenses: Unlike standard lenses, toric lenses are specifically designed to correct astigmatism, providing clearer, more stable vision.

• Refractive surgery: In some cases, procedures such as LASIK or PRK can correct astigmatism by reshaping the cornea. An optometrist can determine whether this option is right for you.

Can astigmatism be prevented?

Since astigmatism is often linked to hereditary factors, it is difficult to prevent. However, regular eye exams can help detect and correct it early on, ensuring optimal vision from a young age.

Schedule an eye exam

If you have symptoms of astigmatism or would like to have your vision checked, please schedule an appointment for a comprehensive eye exam. Our optometrists will help you find the best solution to correct your astigmatism and improve your daily visual comfort.