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Why Do People Blink Their Eyes? People b...

Why Do People Blink Their Eyes?

People blink(眨眼) their eyes tens of thousands of times every day. Scientists have long believed blinking was an involuntary movement and served mainly to keep the eyeballs wet. But a new study suggests it has a more important purpose.

An international team of scientists from the University of California at Berkeley studied the blinking of human eyelids. The journal Current Biology published their findings. The team said they found that blinking “repositions our eyeballs so we can stay focused” on what we are seeing. They said that when we blink our eyelids, the eyes roll back into their sockets--the bony area that surrounds and protects the eyes. However, the researchers found the eyes don’t always return to the same position. They said this causes the brain to tell the eye muscles to reorganize our eyesight.

Gerrit Maus is the lead writer of the report. He serves as an assistant professor of psychology at Nanyang Technological University in Singapore. Maus says: “Our eye muscles are quite sluggish(迟缓的) and imprecise, so the brain needs to constantly adapt its motor signals to make sure our eyes are pointing where they’re supposed to. Our findings suggested that the brain measures the difference in what we see before and after a blink, and commands the eye muscles to make the needed corrections.” The researchers said that without such corrections our surroundings would appear unclear and even jumpy. They said the movement acts “like a Steadicam(摄影稳定器) of the mind.”

The researchers said they asked volunteers to sit in a dark room while staring at a small dot on a flat surface. They used special cameras to follow the volunteer’s blinks and eye movements. After each blink, the dot was moved one centimeter to the right. The volunteers did not notice this, but the brain did. It followed the movement and directed the eye muscles to refocus on the dot. After the dot was moved in this way 30 times, the volunteers’ eyes changed their focus to the place where they predicted it would be.

Professor Maus says “Even though participants did not consciously register that the dot had moved, their brains did, and adjusted with the corrective eye movement. These findings add to our understanding of how the brain constantly adapts to changes, commanding our eye muscles to correct for errors in our bodies’ own hardware.”

1.According to the new study, blinking eyes can     .

A. serve to keep the eyeballs wet

B. consciously correct eye movements

C. reposition eyeballs to stay focused

D. make our eyes adapt to motor signals

2.From the experiment, we can learn that     .

A. the brain commanded the eye muscles to refocus on the dot

B. the eyeballs could stay in the place as they were predicted

C. participants were aware of the dot’s movements to the right

D. volunteers could see the moving dot with special cameras

3.The underlined word “register” in Paragraph 5 possibly means     .

A. reason    B. refocus

C. reserve    D. realize

4.This passage shows that     .

A. eye muscles are quite inactive and imprecise

B. the research is of great value in the eye movement

C. volunteers control their blinks to follow the changes of the dots

D. the brain plays an important role in seeing things clearly

 

1.C 2.A 3.D 4.D 【解析】本文讲述了一项对眼睛的研究,研究发现人眨眼睛的目的,是为了让自己更关注一件事,而眼球的运作是靠大脑进行调控的。可见,大脑在人类通过眨眼睛来把事物看得更清楚这一现象中起着重要的作用。 1.C 细节理解题。根据第二段中The team said they found that blinking “repositions our eyeballs so we can stay focused” on what we are seeing.可知眨眼睛可以重新定位眼球以保持注意力集中。故选C。 2.A 细节理解题。根据文章第三段Our findings suggested that the brain measures the difference in what we see before and after a blink, and commands the eye muscles to make the needed corrections.”可知,从这项研究中发现,大脑测量我们在眨眼前后看到的差异,并命令眼睛肌肉做出所需的校正。故选A。 3.D 词义猜测题。根据文章原句“Even though participants did not consciously register that the dot had moved, their brains did, and adjusted with the corrective eye movement.可知,即使参与者没有_____这个点的移动,大脑也会对我们的眼睛运动进行纠正调整。A. reason推论; B. refocus重调焦距;C. reserve 保留; D. realize意识到。代入原句,可知,即使参与者没有意识到点的移动,大脑也会正常运作。故选D。 4.D 推理判断题。通读全文可知,本文讲述人眨眼睛的目的,是为了让自己更关注一件事,而眼球的运作是靠大脑进行调控的。可见,大脑在人类通过眨眼睛来把事物看得更清楚这一现象中起着重要的作用。故选D。
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增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

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