Astigmatism Test

Astigmatism is the most common vision problem, caused by an irregularly shaped cornea. Usually treated with eyeglasses or contact lenses, astigmatism causes symptoms that range from unnoticeable to slightly blurred vision to headaches, eyestrain and totally distorted vision.

There are four tests used to diagnose astigmatism. The first, the vision test, is the simplest, yet most important determining factor. This is the common test when the patient is asked to read letters of a chart 20 feet away. People with 20/20 vision will be able to see exactly what should be seen from 20 feet away.

The second astigmatism test, the refraction test, uses a lens machine placed in front of the patient to determine which lenses help see the chart better. The third astigmatism test, the keratometry test, measures the curvature of the cornea. Since astigmatism is caused by an irregularly shaped cornea, this test is important in determining the cornea's shape and power. The final astigmatism test, the corneal topography test, allows the doctor to see a three-dimensional map of the cornea, allowing for precise treatment, whether through contact lens fitting or refractive surgery.

For more information on astigmatism tests, please contact us, select a surgeon in your state below.

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Astigmatism, Astigmatism test, astigmatism correction, astigmatism and lasik

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