The major problems are refractive errors like myopia and astigmatism.
主要问题是近视和散光等屈光不正。
| 单词 | astigmatism | |||||||||||||||
| 释义 |
astigmatism
|
|||||||||||||||
| ||||||||||||||

0338.png)
![Page explaining and illustrating astigmatism[2]](/uploads/202412/22/Astigmatism0338.png)

An optical system with astigmatism is one where rays that propagate in two perpendicular planes have different foci. If an optical system with astigmatism is used to form an image of a cross, the vertical and horizontal lines will be in sharp focus at two different distances. The term comes from the Greek α- (a-) meaning "without" and στίγμα (stigma), "a mark, spot, puncture".
英汉网英语在线翻译词典收录了3779314条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。