资料：Whenweseewell，wedonotthinka-名校题库网

资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.

People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.

People who are far-sighted 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. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. 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 suffer from astigmatism have______.

A.a difficulty that can be corrected by an operation
B.eyes that are not exactly the right shape
C.an eye difficulty that cannot be corrected by glasses
D.one eye bigger than the other

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答案： B

本题解析：

本题考查的是细节理解。

【关键词】people；suffer from astigmatism

【主题句】第4自然段Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. 其他人看不清楚，因为他们的眼睛形状不规则。他们有所谓的散光。这也可以通过眼镜来纠正。

【解析】本题的问题是“患有散光的人__________。”A选项“可以通过手术纠正问题”；B选项“眼睛形状不规则”；C选项“一种无法用眼镜矫正的视力问题”；D选项“一只眼睛比另一只眼睛大”。根据主题句，散光主要是眼睛形状不规则造成的，但是可以通过戴眼镜来矫正，因此B选项正确。