Refractive Errors

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Astigmatism

Astigmatism causes blurry vision when looking at objects that are close (e.g., reading a letter) and objects that are far away (e.g., reading a road sign). Vision with astigmatism is not necessarily uniformly blurry; some distances are more out of focus than others.


The cornea is normally smooth and uniformly curved on all sides. In astigmatism, the cornea is irregularly curved. Instead of being round, it may be shaped more like a football. This irregular shape causes light t...Read the full article