英语听力文摘 English Digest 485、看不清？眯眼睛

（单词翻译）

Is squinting¹ really that effective?

眯眼睛真的有效吗？

 

Male: Thanks for coming on this fact-finding trip with me and share the driving.

Female: Glad to do it. It should be a fun trip. I imagine I will learn a lot.

M: I hope so. So i think we are getting close to our exit.So I'll keep an eye on it.For there is a sign but I can't quite make it out.

F: Donne, you're squinting to see the sign. Does that really help?

M: It really does. I can read it now when I am squinting.

F: Let's see now.Light enters the eye from many directions. The lens of the eye bends these rays so that they come together at a focal point. When the rays come together at the retina， the image is in focus. If this focal point is in front of the retina, close objects are clear–nearsightedness; if it is behind the retina, distant objects are clear– farsightedness.

M: Right.Now because they are bent² more, the rays that pass near the edge of the pupil are blurred³ more. If you can eliminate these edge rays then you will have less blurring⁴.

F: That must be what squinting does.

M: Exactly.Squinting uses the eyelids⁵ to block the blurred rays that enter the pupil near its edge. Squinting is not a long-term solution to poor vision, but it sometimes helps in a pinch.

M: Ah,I think we can end this field trip now.I've learned about all I can stand for one day.

男：谢谢你来跟同我一道进行实地考察。

女：很乐意！应该会很有趣的。我觉得我也会学到很多东西。

男：但愿如此！我想我们正在靠近出口了，所以我要集中精力，因为有个地方我总是辨别不出来。

女：多恩，你（眼睛）眯着看东西,真有帮助吗？

男：是的。当我眯着眼睛的时候就可以认出来。

女：让我们现在来看看。光线从四面八方进入到人的眼睛里，眼睛里的晶状体会使这些光线转向，好让它们聚集到同一焦点。当光线聚集到视网膜，清晰的图像就形成了。如果该聚焦点在视网膜前，进出的东西就会很清楚—— 即近视；如果在视网膜后，远处的东西就很清楚—— 即远视。

男：正确！现在由于它们太过倾斜了，经过瞳孔边缘的光线就会被模糊掉。如果你能消除这些边缘的光线，你就会看的清楚些。

女：那就是眯眼睛的效果。

男：完全正确。眯眼睛（的时候），眼皮阻挡了进入瞳孔边缘地区的光线。可这只是在必要时有些帮助，并不是一个解决视力差的方法。

女：阿，我觉得我们现在可以结束这次旅程了。我已经学到了一天能承受的量了。