astigmatism是什么意思_astigmatism的用法_词性_词根

双语例句

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。

反义词

stigmatism

百科

由于发光物点不在光学系统的光轴上，它所发出的光束与光轴有一倾斜角。该光束经透镜折射后，其子午细光束与弧矢细光束的汇聚点不在一个点上。即光束不能聚焦于一点，成像不清晰，故产生像散。

释义

a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus

散光。

易错必背词

词源

"mid　19th　cent.:　from　A-1　‘without’　+　Greek　stigma　‘point’　+　-ISM．"