I've developed a slight astigmatism in one eye.

我有一只眼睛有点散光了

Do you have astigmatism?

你有散光吗？

They have what is called astigmatism.

他们有所谓散光。

You have astigmatism.

你有散光。

Most people have some degree of astigmatism.

大多数人都有一定程度的散光。

The specific cause of astigmatism is unknown.

引起散光的确切原因目前还不清楚。