Astigmatism is often accompanied with myopia or hypermetropia. The symptom of astigmatism is that there is no exact focus for those people. Anything they see is not at the right place as they think and the objects will take on a strange looking. Researches show that astigmatism's eyeball is not a perfect sphere because of the unequal pull of muscles. That's why astigmatism is caused. Not only patients but also ordinary persons can experience that condition.

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