Vision IQ | Astigmatism

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How Vision Works. The function of the eye is similar to a camera. A camera creates images by focusing on an object and allowing specific amounts of light to pass through a hole to create a visual impression on film. The eye functions in much the same way. Common eye problems include Astigmatism, Farsightedness, Nearsightedness and Presbyopia.


Astigmatism occurs in nearly 30% of the non-Asian population. In an eye with astigmatism, the front of the cornea is not equally curved; it is slightly oval in shape, like a football. Light rays entering the eye bend unequally, resulting in a distorted image. Astigmatism usually occurs in conjunction with myopia (nearsightedness) or hyperopia (farsightedness), and is a complicating factor for refractive surgery.

Correcting Astigmatism
Astigmatism can be corrected with eyeglasses, contact lenses or refractive surgery.

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