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【单选题】

Passage 2
When we see well, we do not think about our eyes very often. (79) It is only when we cannot see perfectly that we realize how important our eyes are.
People who are nearsighted can only see things that are very close to their eyes. Everything else seems blurry(模糊的).Many people who do a lot of close work, such as writing, reading and sewing, become nearsighted. Then they have to wear glasses in order to see distant objects clearly.
People who are farsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading, they must get glasses, too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people’s eyes become cloudy because of cataracts(白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself, look at an object out of one eye; then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
"People who are farsighted suffer from just the opposite problem. "The word "suffer" in this sentence refers to ______.

A.
experience
B.
react
C.
feel pain
D.
imagine
题目标签:散光白内障模糊
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【单选题】影响放射性白内障发生和发展的因素不包括()。

A.
射线的性质
B.
接触射线的时间
C.
受照剂量
D.
分次照射
E.
年龄因素

【单选题】先天性白内障患儿出现的眼球震颤属于( )

A.
知觉缺陷型
B.
运动缺陷型
C.
显性眼震
D.
隐性眼震
E.
垂直性

【单选题】糖尿病导致白内障是由于

A.
葡萄糖在晶体内转变成为脂肪
B.
山梨醇脱氢酶活性降低
C.
醛糖还原酶缺乏
D.
葡萄糖在晶体内大量氧化分解
E.
葡萄糖大量进入晶体,山梨醇与果糖在晶体内积蓄

【单选题】-1.00DS/+1.75DC×180°是属于何种散光()

A.
混合散光
B.
单纯近视散光
C.
复性近视散光
D.
单纯远视散光
E.
复性远视散光