What Is Astigmatism?
8. Diagnosis
Some tests can be done during your eye examination to determine whether you have astigmatism or not. If you have astigmatism, the tests can determine its gravity and axis too. The use of a tool called the Snellen chart can determine whether your visual acuity is decreased or not. If it is decreased, a keratometer can determine the curvature of the meridians of the cornea to diagnose astigmatism.
A corneal topography may also be done to see the shape of the cornea and how it looks. Other tests such as retinoscopy, sunburst chart, Javal’s rule, analysis by Alpins, and the use of a stenotic slit can be done too to determine all the aspects of the astigmatism.
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