图画03 : 视敏度 Visual Acuity

斯内伦视力表是眼保健专业人员和其他人用来测量视力(视敏度)的眼科图表。
传统的斯内伦视力表是印有11行英文字体。
使用方法是通过站在距离 20英尺 (1英尺=0.3米) 处读斯内伦视力表来进行。
以下的这个图表可以让你大慨的检查你的视敏度。

A Snellen chart is an eye chart used by eye care professionals and others to measure visual acuity. 
The traditional Snellen chart is printed with eleven lines of block letters.
For acuity test, read snellen chart at a distance of 20 feet (ie. 6 meters)(1 foot = 0.3 meters) place.
To have an approximate idea of your visual acuity. 
Use the below eye chart:

图表的顶部在你的屏幕上应该衡量为5英寸(厘米)!
离屏幕10英尺(约3大步) ，一次测试一只眼睛。
测试时，你可以配戴眼镜或隐形眼镜。

The top of this eye chart should measure 5 inches across on your screen! 
Stand 10 feet from the screen (About 3 large steps) and test one eye at a time.
You may test yourself both with and without glasses or contact lens correction.

如果你能看清楚列 20/20：
您的视力“正常”，也就是在20英尺处，大多数人和您看到的东西一样。

如果你能看清楚列 20/40：
您的视力稍微差，正常视力在距视力表40英尺处可以看到的东西，您要在20英尺处才能看到。

如果你能看清楚列 20/100：
您的视力不太好，正常视力在距视力表100英尺处可以看到的东西，您仍然需要在20英尺处才能看到。

如果你只能看清楚列 20/200：
基本上你几乎失明了!

如果你能看清楚列 20/10：
您的视力非常好，在距视力表20英尺处所看到的内容，正常人要在10英尺处才能看到。

如果你能看清楚列 20/2：
你不是老鹰就是猫头鹰。

If you can read line 20/20：
Your eye sight "normal". At 20 feet, you can see same thing as what others see on the chart.

If you can read line 20/40：
Your eye sight not so good. At 20 feet, you can see same thing as what others can see at 40 feet on the chart.

If you can read line 20/100：
Your eye sight is bad. At 20 feet, you can see same thing as what others can see at 100 feet on the chart.

If you can read ONLY line 20/200：
Too bad, basically, you are almost blind !

If you can read line 20/10：
Your eye sight is excellent. At 20 feet, you can see same thing as what others can only see at 10 feet on the chart.

If you can read line 20/2：
You are either eagle or owl.

alannyou 说：
眼睛是灵魂之窗, 好好照顾你的眼睛。
The eyes are the windows of the soul, take good care of your eyes.