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With review and feedback from CEENTA Optometrist Michael Spicola, OD (Huntersville)
Many people wear glasses or contact lenses to correct their vision. Blurred vision can have several different causes, and one of those causes is astigmatism.
In order for the eye to work properly, light coming into the eye must be properly focused on the retina. When the image is not focused, there is an irregularity in the eye. This irregularity can be the overall shape of the eye, the curvature of the cornea, or both. The cornea should be curved equally in all directions.
Astigmatism occurs when the cornea is curved more in one direction than another. The cornea, the clear outer covering of the eye, focuses the entry of light into the eye, and contributes between 65-75 percent of the eye's total focusing power.
CEENTA Optometrist Michael Spicola, OD, says a cornea without astigmatism is comparable to a basketball, whereas a cornea with it is like a football. Like a basketball, a healthy cornea has the same uniform curve all the way around, while an eye with astigmatism has a steeper curve on one side, like a football.
Astigmatism is very common and is usually caused naturally. However, in rare cases it can be caused by chalazia, corneal scars, or keratoconus.
If you notice blurred vision, eyestrain, or even headaches, you may have astigmatism. Some people even have double vision, particularly at night.
Fortunately, glasses or contact lenses can easily treat astigmatism issues. People getting cataract surgery may also consider replacement lenses that correct for astigmatism.
“We’re fortunate to have many advances that help us correct astigmatism,” Dr. Spicola said.
If you need an eye exam, schedule an appointment at CEENTA. Our doctors will determine if astigmatism treatment is what you need to see clearly.
This blog is for informational purposes only. For specific medical questions, please consult your doctor.
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