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It’s the 24th century, and aboard the U.S.S. Enterprise, Star Trek chief engineer Geordi LaForge scans the heavens by means of the sophisticated prosthetic lenses that give him superhuman vision. That may be science fiction, but we mere myopes of the 21st century may not have to wait 300 years before we can boldly see where no one has seen before. 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, owls -- and Goerdi LaForge.
Josef Bille, a 54-year-old physics professor, and his colleagues at the university hope that their ultra-customized vision aids will enable hunters to better spot their quarry at dawn, campers to pitch-their tents at dusk without flashlights, drivers to make out the road ahead with more ease and persons suffering from night blindness to see in the dark. Theatergoers might also benefit: the lenses work best when the pupils are fully dilated as when looking at a lighted stage from the depths of a dark auditorium. "Forget opera glasses," crows Bille, "they will no longer be necessary."
Bille and his team work with an optical instrument called an active mirror -- a device used in astronomical telescopes to spot fledgling stars and far distant galaxies. Connected to a wavefront 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 membrane that covers the lens of the human eye. The highly precise data from the two instruments -- which, Bille hopes, will one day be found at opticians all over the world -- serve as a basis for the production of completely individualized contact lenses that correct and enhance vision so well that the wearer’s sight is actually better than nature’s perfect 20-20.
73. Which of the following is true?
A. In the 24 th century, people may have superhuman vision.
B. In the 21st century, people can see more clearly at night than owls.
C. In the 21st century, there have existed prosthetic lenses.
D. In the 24th century, there will be prosthetic lenses.
正确答案是
74. What’s a "myope"?
A. An astronaut.
B. A computer fan.
C. A near-sighter.
D. A far-sighter.
正确答案是
75. According to the passage, under what condition can the ultra-customized vision aids work best?
A. Hunting in a mountain.
B. Hunting with the help of a flash light.
C. Looking at a well-lit stage from the darkness.
D. Pitching a tent.
正确答案是
76. What are the two instruments mentioned in the third paragraph?
A. The active mirror and the laser beam.
B. The laser beam and the cornea.
C. The cornea and the wave-front sensor.
D. The wave-front sensor and the active mirror.
正确答案是