英文单词：astigmatism

中文含义：散光

英语词性：noun

美式发音：/əˈstɪɡmətɪzəm/

同义词：blurry vision, distorted vision, uneven focusing

易混淆单词：myopia (近视), hyperopia (远视)

双语例句：

1. 它的作用是，使视网膜上的光通过晶体的折射进而聚焦，便于眼睛识别物体，但如果存在散光，那么光就无法正常聚焦。

Its role is to make the light on the retina refract through the lens and converge, making it easier for the eye to recognize objects, but if there is astigmatism, the light cannot converge normally.

2. 眼球的颜色并不影响视力，但是某些颜色的眼球，比如深褐色的眼球，更容易患上散光。

The color of the eyeball does not affect vision, but certain colors of the eyeball, such as dark brown, are more prone to astigmatism.