First let me back up a bit and talk about vision correction before the printing press.
让我先回顾下在印刷术之前的视力矫正是什么样的。
In natural vision, after an image is formed in the retina it is sent to an area at the back of the brain, called the visual cortex, for processing.
自然视觉的过程是：视网膜成像后，图像被传送到大脑后部叫做“视觉皮层”的地方，在那里进行信息处理。
This happens when the back of the lens capsule - the part of the lens that wasn't removed during surgery and that now supports the lens implant - becomes cloudy and impairs your vision.
它的发生是由于晶状体囊的后部——在手术当中为了用于支撑人工晶体而未被摘除的晶状体部分——变得浑浊，从而损害您的视力。
A cataract is a painless, cloudy area in the lens of the eye that blocks the passage of light to the retina, the nerve layer at the back of the eye, usually causing vision problems.
白内障是指眼内晶状体的无痛性浑浊阻碍了光线到达视网膜(眼球后部的神经层)，从而引起视力问题。
Not only does it have front, back and side vision it can also see vertically and judge depths, claims the study.
研究说明，它不仅有前后和侧面视野，还能上下看，而且能判断深度。
The surveyor could not see what was in front as his whole field of vision on that side was covered by the broad clumsy back of the driver.
土地测量员没法看清前面是什么，因为他的整片视野被车夫宽大而笨拙的背挡住了。
We would not wish to see another case like the young boy who lost his central vision back in October 2005 through looking directly at a partial eclipse in his school playground.
我们不希望2005年一个男孩在学校操场上裸眼看日偏食而失去大部分视力的惨剧再次发生。
We sometimes find it useful to break down the vision into smaller goals - means to an end - which can always be tracked back to that bigger vision.
有时我们发现，将愿景分割成一些小的目标很有用，它们定义了一个终点，而且总是可以回溯到大的愿景。
To generate fresh ideas we have been told to think outside of the box and then jump back in; vision building destroys the box and builds a new one.
我们知道，要产生崭新的想法，必须跳出框框去思考，然后再跳回来；而愿景建设则要打破旧框框，建立新格局。
The team then needs to make it a point to regularly go back to the vision document throughout the project and make any necessary course correction to stay in sync with the vision.
随后团队要特别重视在项目过程中定期地回顾一下愿景文档，并做一些必要的航向修正以保持与愿景同步。
To make this vision a reality, however, data pros behind the scenes must do a considerable amount of legwork on the back end.
但是，要将这一愿景变为现实，幕后的数据专业人员必须在后端执行大量的后勤工作。
He can score with his back to the basket when he chooses to, and he also has great passing ability and vision.
如果他愿意的话，他能够背靠篮筐得分，他还拥有出色的传球能力和视野。
To avoid the tax, they predicted, many employers would cut back on dental and vision coverage.
他们预言说，为避免付更多的税，许多雇员会减少牙科与眼科的保险。
With dauntless persistence, a sharp vision of what Russia should become and a sense that he embodied the spirit of Mother Russia, Putin has put his country back on the map.
凭借着不屈不挠的毅力、俄罗斯该成为什么的敏锐眼光以及体现俄罗斯母亲之精神的意识，普京使俄罗斯重归世界地图。
You let a few tough instances hold you back from the vision of success you formed within your mind.
你用一些艰苦的事例（为借口）抑制在你心中形成的对成功的幻想。
Still, if Wall Street was waiting to see if Apotheker had a clear-eyed vision of how HP can get its momentum back and keep it, he laid it out Monday.
不过，假如华尔街之前在等着看对于惠普怎样才能重获并保持动力，李艾科是否有清晰的认识，那么李艾科在本周一给了他们答案。
When you're amidst designing and getting paid for it, you don't step back and see if you're on the right track - the one that's true to yourself and your design vision.
当你正在设计中并为之努力付出时，你不会停下来看看是否在对的路上——对你和你的设计观来说正确的东西。
Instead I have exercised my eyes and after a few weeks of exercising my eyes, they have returned back to normal vision.
相反，我一直做眼操，数周之后，我的眼睛就恢复以往的视力水平了。
If I fired back that playing video games wrecked one's eyesight, he'd trot out a study proving that they improved a person's field of vision.
如果我反驳他玩电子游戏对视力不好，他会拿出它有利于拓宽人的视野那一套说辞。
The stone circle is said to date back to 3200 BC and is a vision in itself.
它可以追溯到公元前3200年，是一处很独特的景点。
I raced back to my home tears stinging my eyes and blurring my vision.
我跑回家，泪水模糊了我的双眼。
Yarbus's experiments showed that our gaze rapidly flicks back and forth across an image so that our centre of vision focused on the most important parts.
Yarbus的实验显示我们的目光会在图像上快速地来回移动，这样我们看到的中心就落在一些最重要的部位上。
MILAN — Taking the new movie “Tron Legacy” as inspiration — and the film’s original 1984 version as back story — the Versace men’s show was both a memory stick and a vision of a futuristic world.
米兰-灵感来自新电影“电子争霸战2”-同时使用这部电影的第一部[1984版]作为前景剧本-范思哲男装发布会既有过去的记忆也有对未来世界的幻想。
SO, if the vision of the enterprise is to simply implement a set of Web services and then try to reap the benefits of SOA, it is advisable to step back and reconsider.
因此，如果企业的远景仅是实现一组Web服务，然后尝试获得SOA所带来的好处，最好后退一步，重新对此进行考虑。
Google has taken some steps to accommodate carrier interests while scaling back on its original vision of unprecedented freedom.
Google已经采取了一些举措以迎合运营商的利益，缩减初始版本的空前自由度。
Travel is like a lesson for me, because I will broaden my vision and enrich my experience, when I finish the journey, I will come back with the new mood.
旅游对于我来说就像是一门课，因为我会开阔视野，丰富经验，旅行结束的时候，我会带着新的心情回来。
My father had been traveled to many places, he opened his vision and then went back home to find another job he liked.
我父亲已经去过很多地方，他开阔了视野，然后回到家找到另一个他喜欢的工作。
My father had been traveled to many places, he opened his vision and then went back home to find another job he liked.
我父亲已经去过很多地方，他开阔了视野，然后回到家找到另一个他喜欢的工作。
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