By day, Billes contact lenses will focus rays of light so accurately on the retina 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 . At night, the lenses have an even greater potential. Because the new lens in contrast to the already existing ones also works when its dark and the pupil is wide open, says Bille, lens wearers will be able to identify a face at 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.

　　Billes lenses are expected to reach the market in the year 2000, 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.

　　36. The new contact lens is meant for ______.

　　A) astronomical observations

　　B) the night blind

　　C) those with vision defects

　　D) optical experiments

　　现在很多考生的问题是复习方法本末倒置，花了大量的时间学习和研究考试形式，却忽视了提高阅读能力。

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