散光：因角膜(覆盖眼球的一层透明膜)不规则弯曲而引起的影象变形。

Astigmatism: distorted vision resulting from an irregularly curved cornea, the clear covering of the eyeball.

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我们长时间注视我们面前的东西时，眼球会紧张变形，它们也会累。

When we're staring at things right in front of our faces for prolonged periods of time, our eyes get strained, they get tired.

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例如，骨骼或如眼球类的东东等也许不会真正的变形很多，尽管可以压缩它。

For example, the skeleton or things like eyeballs etc may not really deform much, though the flesh around them may.

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