时差N小时 你对隐形眼镜了解多少?(下)

Depending on your vision, the right kind of lens helps your eye focus light properly and projecta clear image onto the retina.

取决于你的视觉，合适的眼镜会帮助眼睛准确的聚焦光线，在视网膜上形成一个清晰的影像。

Ok, fine, but why do contacts make things seem so clear?

好，就算如此，但为什么隐形眼镜使事物看起来很清楚呢？

Patience, young patience.

别急，耐心听完。

Glasses have what's called an optical center, which means that objects appear clearest when viewed through the center of the lenses.

眼镜有所谓的光心，这意味着通过镜片的中心时视野会变得最清晰。

But when you're wearing glasses and you move your eyes to the side, or up, or down, things can seem slightly distorted or blurry¹.

但是当戴上眼镜，眼睛左右移动，或上下转动，似乎视野会变得轻微扭曲或模糊。

So because contacts are right on the eye and move with the eye, there's no optical center.

所以，因为隐形眼镜恰巧在眼睛上而眼睛移动的时候没有光心。

Right. Put another way, the entire contact lens is the optical center.

没错。换句话说，整个隐形眼镜就是光心。

So no matter which way you move your eyes, objects appear in perfect focus.

所以，无论以何种方式移动眼睛，物体都出现完美的焦点。

And that's why everything seems so much clearer!

这就是为什么视野突然清晰很多的原因！

Like this eraser, and this envelope. . .

比如这块橡皮擦,这个信封…

I get it, Don.

我明白了，唐。

1 blurry   

adj.模糊的；污脏的，污斑的

参考例句：

• My blurry vision makes it hard to drive. 我的视力有点模糊，使得开起车来相当吃力。 来自《简明英汉词典》
• The lines are pretty blurry at this point. 界线在这个时候是很模糊的。 来自《简明英汉词典》