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
42
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] Which of the following is true about Bille’s lenses?
选项
A、They will be sold at a very low price.
B、Their production process is complicated.
C、Purchase orders can be made through the Internet.
D、They have to be replaced every day.
答案
A
解析
文章最后一句提到“预期这种眼镜售价为大约1美元一对,和传统日抛型价格一样”,可知这种眼镜价格很便宜,选A。
转载请注明原文地址:https://tihaiku.com/zcyy/2932249.html
相关试题推荐
Abouttwoweeksago,theU.S.DepartmentofHealth’sSubstanceAbuseandMe
[originaltext]TheHarvardStudyofAdultDevelopmentmaybethelongeststu
[originaltext]TheHarvardStudyofAdultDevelopmentmaybethelongeststu
[originaltext]TheHarvardStudyofAdultDevelopmentmaybethelongeststu
[originaltext]M:MathDepartment,DoctorWebsterspeaking.W:Hello,Prof.Webs
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcen
随机试题
Firstofall,eyeshavetorestwhenitworkstwohourslater.Thenyoushouldi
(short)______aftershegraduatedfromtheuniversity,shemovedtoanothercit
Ifitwereonlynecessarytodecidewhethertoteachelementaryscienceto
Themisunderstandingofawordcouldevenaffectthewayawarended.[br]Tosa
A.两者均有 B.反常呼吸 C.纵隔摆动 D.两者均无开放性气胸()
正方体切掉一块后剩余部分如下图左侧所示,右侧哪一项是其切去部分的形状? A
直肠脱垂的发病主要与哪个因素有关A.风邪 B.热邪 C.燥邪 D.气虚
建设单位以工程质量不合格为由,拒绝支付工程款,施工单位诉至人民法院。向人民法院提
创造力的核心成分是()和()。
抓斗式挖泥船挖掘黏土和密实砂,当抓斗充泥量不足时,应()。A.下斗间距宜大
最新回复
(
0
)