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  3. It’s not what Thomas McKay sees in this machine, but what the machine sees in him that determines how well his eyes view the wor

It’s not what Thomas McKay sees in this machine, but what the machine sees in him that determines how well his eyes view the wor

admin2015-02-12  32
问题     It’s not what Thomas McKay sees in this machine, but what the machine sees in him that determines how well his eyes view the world. McKay is demonstrating a prototype device that sends a hundred thousand beams of light into his eye to measure the focusing accuracy of his eye’s lens. As those beams travel into the eye, they’re reflected off the retina, and as they come back they are bent a little bit according to the refracted abnormalities inside the eye. By calculating how accurately the eye’s lens bends the light, the Visx machine can determine how much correction the eye needs to see normally—without a patient ever looking at an eye chart.
    It’s called wave front technology. Physics professor Josef Bille pioneered it at the University of Heidelberg in Germany, twenty-five years ago, as a way to counter atmospheric distortion in telescopic images. He was brilliant enough to know the implications of his findings, and soon eye doctors noticed the possible applications in their field.
    There are a surprising number of eye doctors who know about the new technology but still insist upon their eye charts. Are they merely luddites who resist technological progression? Not really. Many are acutely aware of the limitations. I myself am no expert in this field, but I do know that human vision is more complex than how well our eyes bend light. It would be an oversimplification to simply look at the optical system of the eye and say we have the best correction. Visx wave front technology is a useful tool but optometrists may not yet be ready to throw away eye charts.
Why isn’t it important what McKay sees in the machine?
选项 A、He doesn’t like the machine.
B、An eye chart is better.
C、It’s what the machine sees in him that is important.
D、The prototype doesn’t work very well.
答案C
解析 属逻辑关系题。本文开头指出：“决定托马斯·麦凯双眼看世界能力的并不是他从这台机器身上看到了什么，而是这台机器在他身上看到了什么。”这说明麦凯从这台机器身上看到了什么并不重要，重要的是这台机器在他身上看到了什么。
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