2. 外语
  3. A new high-performance contact lens under development at the department for applied physics at the University of Heidelberg will

A new high-performance contact lens under development at the department for applied physics at the University of Heidelberg will

admin2017-02-01  35
问题     A new high-performance contact lens under development at the department for applied physics at the University of Heidelberg will not only correct ordinary vision defects but will enhance normal night vision as much as five times, making people’s vision sharper than that of cats.
    Bille and his team work with an optical instrument called an active mirror—a device used in astronomical telescopes to spot newly emerging stars and far distant galaxies. Connected to a wave-front sensor that tracks and measures the course of a laser beam into the eye and back, the aluminum mirror detects the deficiencies of the cornea, the transparent protective layer covering the lens of the human eye. The highly precise data from the two instruments—which, Bille hopes, will one day be found at the opticians(眼镜商)all over the world—serve as a basis for the production of completely individualized contact lenses that correct and enhance the wearer’s vision.
    By day, Bille’s contact lenses will focus rays of light so accurately on the retina(视网膜)that the image of a small leaf or the outline of a far distant tree will be formed with a sharpness that surpasses that of conventional vision aids by almost half a diopter(屈光度). At night, the lenses have an even greater potential. "Because the new lens—in contrast to the already existing ones—also works when it’s dark and the pupil is wide open," says Bille, "lens wearers will be able to identify a face at a distance of 100 meters"—80 meters farther than they would normally be able to see. In his experiments night vision was enhanced by an even greater factor: in semi-darkness, test subjects could see up to 15 times better than without the lenses.
    Bille’s lenses are expected to reach the market in the year 30, and one tentative plan is to use the Internet to transmit information on patients’ visual defects from the optician to the manufacturer, who will then produce and mail the contact lenses within a couple of days. The physicist expects the lenses to cost about a dollar a pair, about the same as conventional one-day disposable lenses.
What do the two instruments mentioned in the second paragraph refer to?
选项 A、The astronomical telescope and the wave-front sensor.
B、The aluminum mirror and the wave-front sensor.
C、The aluminum mirror and the laser beam.
D、The active mirror and the contact lens.
答案B
解析 第2段第2句提到“铝镜和波前传感器连接在一起。前者用来测量角膜的缺陷，角膜是在人眼睛晶状体外的起保护作用的一层透明物体；后者是追踪测量激光束往返人眼的过程。由此可知，这两种仪器指的是铝镜和波前传感器，答案为B。
转载请注明原文地址:https://kaotiyun.com/show/HlF7777K
0

大学英语六级

相关试题推荐
随机试题
最新回复(0)