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
2019-06-23
46
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/CVX7777K
0
大学英语六级
相关试题推荐
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand1
A、Aladywithaveryslimfigure.B、Asportsplayerwithoutlegs.C、Aplayercompetinginaranningrace.D、Aladyholdingaone
KyleMaguirewantedtoattendtheUniversityofNebraskaassoonashegraduatedfromhighschoolyearsago.AnaspiringWebdev
Itwasgoingtohaveroughlytheeffectofaneutronbombattackonhighstreetsandshoppingmalls.Thebuildingswouldbeleft
A、Tuesdaymorning.B、Tuesdayafternoon.C、Thursdaymorning.D、Thursdayafternoon.B男士说,葬礼在星期二举行,遗体吊唁仪式安排在下午。所以答案是B。对话提到两个时间点,星期二
A、Sheknewwherethegoodswereinthesupermarket.B、Sheaskedotherstotakehertotherightplace.C、Shemanagedtofindthe
A、Thefrequenttraindelays.B、Thefoodsoldonthetrains.C、ThemonopolyofBritishRailways.D、Thehightrainticketfares.C
Somemarriagesseemtocollapsesosuddenlythatyou’dneedacrystalballtopredicttheirdemise(灭亡).Inothercases,though,
Smokersinthe"landofthefree"arefindingthemselvesincreasinglylessfreetopursuetheirhabit.NewYorkCityofficialsa
随机试题
男性茶艺人员原则上不推荐佩戴发饰
在一个进程的工作没有全部完成之前,另一个进程就可以开始工作,称它们具有( ),并且把可同时执行的进程称为( )。
女性,45岁,近1周来白带较多,黄色,无臭味。妇科检查:宫颈中度糜烂,宫体正常大小,两侧附件阴性,宫颈活检报告为“慢性宫颈炎”。治疗慢性宫颈炎,疗效最好、疗程较短的首选方法是下列哪一项
若管电压为100kVp,则高压电缆对地电压为
藿香正气散中具有表里同治,升清降浊作用的药物是
下列属于变动成本的是()。
根据《关于加强社会工作专业人才队伍建设的意见》,下列事业单位中,可将社会工作专业岗位明确为主体专业技术岗位的是()。
明末清初的学者顾炎武,在平时的读书中就很注意思考问题。他认为,只有善于并认真思考,才能把前人的学问_______,并且在这个基础上进行创新,提出自己独到的_______。所以他在日常写作时,抱定写“古人之所未及就”,也就是写前人没有_______的。他一旦
南北朝时期,宗教广泛流行,在下列哪些文化领域得到直接反映?()①建筑②雕刻③绘画④哲学
下列关于设备管理器功能的描述,错误的是______。
最新回复
(
0
)