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
2018-05-11
40
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 (眼睛商) 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/60T7777K
0
大学英语六级
相关试题推荐
A、Becausehecan’tfindanidealdate.B、Becauseheistoocommonaperson.C、Becausehehasfailedtorealizehisdreams.D、Bec
A、Becauseofthestressfactors.B、Becauseoftheleisureactivities.C、BecauseoftheTVwatching.D、BecauseofthegeneralAme
A、Cameras,GPSandaloudspeakerareinstalledinit.B、Anoperatorstaysinsidetherobotandcontrolsit.C、Therobotcantalk
A、TheUniversityfaculty.B、TheStudentAssociation.C、TheAlumniAssociation.D、ThePresidentoffice.C女士说组织该活动的是校友联合会,故选C。听到什么
A、Wetendtobesatisfiedafterasecondthought.B、Wearenotalwaysthrilledwiththemafterwards.C、Wealwaysregretthehast
A、Theyhardlylikeanybodyintheworld.B、Theycanhardlyrealizetheirownvalue.C、Theythinktheyhavedoneenough.D、Theyh
A、Thedevelopmentofonlinevideos.B、Thelimitationofnewlaws.C、ThelowerqualitiesofDVDitself.D、Theuseofhandheldvid
Englishistheleadinginternationallanguage.Indifferentcountriesaroundtheglobe,Englishisacquiredasthemothertongue
Anewhigh-performancecontactlensunderdevelopmentatthedepartmentforappliedphysicsattheUniversityofHeidelbergwill
Smokersinthe"landofthefree"arefindingthemselvesincreasinglylessfreetopursuetheirhabit.NewYorkCityofficialsa
随机试题
根据十三届全国人大五次会议审议通过的《政府工作报告》,下列属于2022年我国经济发展主要预期目标的是:①居民消费价格涨幅3%左右②实现高水平科技自立自强③国内生产总值增长6.5%左右④粮食产量保持在1.3万亿斤以上⑤坚持政府过紧日子,更好节用裕民
关于胸部CT扫描技术,叙述错误的是
患者,女,58岁。今日胸痛发作频繁,2小时前胸痛再次发作,含化硝酸甘油不能缓解。检查:血压90/60mmHg,心律不整。心电图Ⅱ、Ⅲ、aVF导联ST段抬高呈弓背向上的单向曲线。应首先考虑的是
人工流产负压吸引术适用于
腐败坏死性蜂窝织炎的特征性表现是A.红、肿、热、痛B.功能障碍C.可触及捻发音D.引流区淋巴结肿痛E.以上均是
长输管道在石方或戈壁段进行管道下沟及回填作业时,应在沟底铺垫和管顶回填()的细土。
一般会计人员离开会计岗位办理交接手续时,由( )监交。
在现代社会中,通常控制社会、经济运行的两大并行力量是()。
下列表述中,最能体现启发式教学思想的是()。
人在运动时要流汗的原因是()。
最新回复
(
0
)