首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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
admin
2018-08-25
12
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.
The new contact lens is meant for _____.
选项
A、those with vision defects
B、astronomical observations
C、the night blind
D、optical experiments
答案
A
解析
第1段提到“新的高性能隐形眼镜不仅可以纠正普通的视力缺陷,还可以把正常的夜间视力提高5倍”,可得知这种眼镜是为有视力缺陷的人设计的,因此选择A。
转载请注明原文地址:https://kaotiyun.com/show/dQH7777K
0
大学英语六级
相关试题推荐
Toseeifhaircoloraffectsaperson’schancesofgettingajob,researchersatCaliforniaStateUniversityasked136colleges
Ifyou’relikemostpeople,you’ve【B1】______fakelisteningmanytimes.Yougotohistoryclass,sitinthethirdrow,andlooks
Ifyou’relikemostpeople,you’ve【B1】______fakelisteningmanytimes.Yougotohistoryclass,sitinthethirdrow,andlooks
A、Afitnessprogramofferedtothegeneralpublic.B、Aphysicalexercisetobuildupmuscles.C、Aprogramthatmakespeoplekeep
A、Runningisthebestwayforpeople’shealth.B、Runningmaykeeppeopleawayfromheartdisease.C、Runningfastandfarmatters
A、Becausehismotherwantedhimtobeachef.B、Becausehistwograndmothersloveddeliciousfood.C、Becausehewouldliketodo
FrustratedwithdelaysinSacramento,BayAreaofficialssaidThursdaytheyplannedtotakemattersintotheirownhandstoregu
Lackofsleepmakesyougainweightandraisesyourriskforheartdiseaseanddiabetes,apartfromresultingin【C1】______vision
A、Itwaswellplanned.B、Itwascompletedinashorttime.C、Itwasledbymilitarycommanders.D、Ithelpedhimgetelectedtop
Children’sHealthcareofAtlantawantstomoveGeorgiaoutofthetop10listforchildhoodobesity(肥胖)by2016,officialssaid.
随机试题
1936的苏联新宪法的内容包括 ①前苏联是工农社会主义国家②前苏联的经济基础是生产资料的社会主义所有制③前苏联实行各尽所能、按劳分配原则④前苏联的政治基础是各级人民代表大会
甲巯咪唑(他巴唑)治疗毒性弥漫性甲状腺肿的作用机制是
中国某公司与美国某公司适用贸易术语进行交易,该美国公司作为买方同意该中国公司从下列术语中进行选择,中国公司作为货物的卖方想从中选择承担义务最小的术语,请问中国公司应该争取适用下列哪个贸易术语?()
(2013年)已知10%时水的运动黏滞系数ν=1.31×10-6m2/s,管径d=50mm的水管。在水温t=10℃,管内要保持层流的最大流速是()m/s。
根据我国《个人外汇管理办法》,可以通过外汇储蓄账户办理的业务是()。
某事业单位购入一台不需安装的专用设备,支付购买价款120万元,支付运费2万元,支付保险费1万元,该单位以银行存款支付了上述款项。则该事业单位应编制的会计分录为()。
银行卡是指由商业银行发行的信用支付工具,其特点是具有透支功能。()
仁达车床厂商调函调字[2006]3号奥达棉纺厂:我厂技术员吴××同志,男,现年40岁,1986年毕业于北方工业大学,目前是我厂技术骨干。该同志工作一贯认真负责,有较高的专业技术水平。其家住在你厂附近,家中有老母及卧床不起的妻子需要照顾。
A、 B、 C、 D、 C本题属于九宫格类图形推理。通过观察图形可知,该九宫格中的各图形均为一个封闭的图形。所以答案为C。
只要中国的出口没有根本扭转态势、房地产行业仍______保增长和保民生两大重任的话,房地产政策就不会有太大调整,但不排除微调的______。填入横线部分最恰当的一项是()。
最新回复
(
0
)