首页
登录
职称英语
A new high-performance contact lens under development at the department for
A new high-performance contact lens under development at the department for
游客
2023-08-16
77
管理
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. [br] 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:http://tihaiku.com/zcyy/2932246.html
相关试题推荐
Anewhigh-performancecontactlensunderdevelopmentatthedepartmentfor
Anewhigh-performancecontactlensunderdevelopmentatthedepartmentfor
Indepartmentstoresandclosetsallovertheworld,theyarewaiting.Their
Indepartmentstoresandclosetsallovertheworld,theyarewaiting.Their
Indepartmentstoresandclosetsallovertheworld,theyarewaiting.Their
Indepartmentstoresandclosetsallovertheworld,theyarewaiting.Their
Internationalgovernments’inactionconcerningsustainabledevelopmentiscl
Internationalgovernments’inactionconcerningsustainabledevelopmentiscl
青藏铁路(Qinghai-TibetRailway)是西部大开发(WesternDevelopmentProgram)的标志性工程,是中国新世纪四
经过几千年的发展,这类戏曲艺术才逐渐变得完整。Itwasnotuntilseveralthousandyearsdevelopmentthat
随机试题
Einstein’stheoryofrelativityseemedhardtobelieveatthetime______.A、when
[originaltext]M:Hey,Amanda!Howcomeyou’rewearingasuit?I’veneverseeny
检算在用桥梁结构或构件承载能力极限状态评定的内容包括()。A.强度 B.
患者女性,40岁,44舌侧尖斜形折断2天,松动,颊侧半稳。叩诊轻度不适,牙冠稍短
哪部医学著作将呃逆分为外感、内伤两大类A.《景岳全书》 B.《症因脉治》 C
案例八: 一般资料:求助者,男性,58岁。 案例介绍:求助者退休前是公交车司
下列企业人力资源计划类型中,将目标定为改善员工知识技能和工作作风的是( )。A
根据企业国有资产法律制度的规定,下列关于我国企业国有资产监督管理体制的表述中,正
根据企业破产法律制度的规定,下列有关债权申报的表述中,正确的是()。A.破产申
采取托收承付和委托银行收款方式销售货物,其增值税纳税义务发生时间为收到货款的当天
最新回复
(
0
)