What is Astigmatism?
[[File:Astigmatisme B.jpg|thumb|Astigmatisme B]]'''Astigmatism''' is defined as the eye creating two images instead of one image on the [[retina]]. This happens when the power of the eye isn't the same in all directions, often because the front of the eye (the [[cornea]]) is shaped more like the back of a spoon than a perfect sphere. Astigmatism does not affect the health of the eye, and eyes with astigmatism can be perfectly healthy. The result is that objects look blurry, but how much blur is different in different directions, which is why people with astigmatism often have trouble reading some letters but not others. [[File:Astigmatism text blur.png|thumb|Astigmatism text blur]] It can also cause headaches and eyestrain. In most cases it is easily fixed with [[glasses]], [[contact lens]]es, or surgery. [[Category:Diseases and disorders of the eye]]