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Astigmatism

 

Question: Please explain the eye condition called astigmatism?

Answer: Astigmatism* is a common vision condition that occurs when the front surface of the eye or the lens inside the eye is slightly irregular in shape. The shape irregularity is due to the front surface of the eye or the lens being more oval in shape rather than round. This causes the light that enters the eye to have a refractive error, which inhibits images from focusing properly on the back of the eyeball (retina). Patients with this condition can have vision that is blurred at all distances.

Astigmatism is caused by small differences in the growth and alignment of the components of the eye. In some cases, there may be a hereditary component or this condition may result from such factors as pressure from the eyelids on the cornea.

 

Patients with severe astigmatism will usually have blurred or distorted vision at all distances. Patients with mild astigmatism may experience headaches, eyestrain, fatigue or blurred vision at certain distances.

This condition can be effectively diagnosed during a comprehensive eye health and vision examination done by your Optometrist. Almost all levels of astigmatism can be optically corrected with properly prescribed and fitted glasses or contact lenses. Laser surgery may be an option for some cases if the patient is interested in this treatment method and their Optometrist deems the patient an appropriate candidate for laser surgery.

If glasses or contact lenses are prescribed, it may take a few days to adjust to wearing them. After that, having an astigmatic condition will probably not significantly affect the patient’s lifestyle. Regular optometric care will insure that proper vision is maintained.

 

The Canadian Association of Optometrists recommends the following comprehensive eye health examination guidelines:

• Birth to 5 years: Immediately, if parents sense a problem, otherwise by age 3 and again prior to entering school.
• School age children 6-19 years: Annually or every 2 years.
• Over 19 years of age: Every 2 years or sooner if recommended by your Optometrist.

 

* All content is provided for education and information, and is no substitute for the advice of your optometrist. This information is provided courtesy of the British Columbia Association of Optometrists (B.C.A.O.). The B.C.A.O. assumes no responsibility or liability arising from any errors or omissions or from the use of any information contained herein.