在英文中，眼镜度数的单位是diopter /daɪˈɒptə(r)/（屈光度）。

 

释义：a unit for measuring the power of a lens to refract light (= make it change direction)

 

屈光度

 

大家在视力检验报告上就能看到屈光度，如果是-3.5D，这里的D就是diopter的缩写。而-3.5D代表的也就是近视350度。

 

A "plus" (+) sign in front of the number means you are farsighted, and a "minus" (-) sign means you are nearsighted. These numbers represent diopters, the unit used to measure the correction, or focusing power, of the lens your eye requires. Diopter is often abbreviated¹ "D".

数字前的加号就意味着你是远视，减号则意味着你是近视。这些数字代表屈光度，指能够矫正你眼睛聚焦能力的镜片的单位。Diopter常缩写为"D"。

 

例句：

 

I am nearsighted with 2.0 diopters.

我近视200度。

 

How strong are your glasses?

你的眼镜多少度?/你近视多少度?

 

*注意这里要用strong来修饰，度数越高，镜片越厚。

 

How good is your vision?

你视力怎么样?

 

如果你在对话中和朋友正在围绕着眼镜问题来聊，你也可以直接这么问：

What prescription² are your glasses?

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