describes the shape of the cornea as being oval instead of a
have two types of curves. The curves are considered to be a
steep curve as well as a flat curve. The presence of these two
types of cornea curves causes light to focus on more than one
point with in the eye. For this reason,
can blur both near and far vision.
often occurs along with nearsightedness or farsightedness.
There are two common types of
When the cornea has a distorted shape, it is called
When the lens is distorted, it is called
Either type of
Astigmatism can cause blurred vision.
can be detected and measured with
vision testing and refraction.
tends to remain constant, neither improving nor deteriorating
much over time.
Astigmatism can be corrected with glasses,
contacts, or a variety of surgical procedures. The most common
surgeries used to correct
Keratotomy and LASIK. These procedures reshape
the cornea so it becomes more spherical.