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缺少与阳光的接触会损害视力

文章来源:admin    时间:2020-06-01

  Being nearsighted is far more common than it once was. The prevalence of myopia, the condition’s medical name, in Americans has soared by 66 percent since the early 1970s, according to a 2009 study by the National Eye Institute; in China and other East Asian countries, as many as 90 percent of recent high school graduates are thought to be nearsighted. 近视比曾经遍及多了。据美国国家眼科研讨所2009年的一项研讨显现,自20世纪70年代初,美国人近视的份额飙升了66%;而在我国和其他东亚国家,高达90%的高中毕业生被视为近视。   Myopia results when eyeballs are longer than normal, changing the angle at which light enters the eye and therefore the ability to focus on distant objects. 当眼球比正常情况下长时,近视就会发作,改动光线进入眼睛的视点,然后改动眼睛聚集远处物体的才能。   The disorder1 involves a complex interplay of genetics and environment and usually begins before adolescence2, when the eye is growing, but it can worsen in early adulthood3. 这种疾病触及了遗传和环境的杂乱彼此效果,一般发作在青春期之前,那时候眼睛还在生长,但在成年初期可能会恶化。   Some experts connect the elevated rates of myopia to the many hours young people stare at computers and other screens. But a recent study published in JAMA Ophthalmology suggests that a greater factor may be a side effect of all that screen-watching — it’s keeping children inside. 一些专家认为近视率升高与年轻人长期盯着电脑和其他屏幕有关。但最近宣布在《美国医学会眼科杂志》上的一项研讨标明,更重要的要素可能是使孩子长期盯着屏幕看的副效果是让孩子呆在了室内。   This new study joins a growing body of research indicating that a lack of direct sunlight may reshape the human eye and impair4 vision. 越来越多的研讨标明,短少与阳光的触摸可能会改动眼睛的形状,而危害视力。   Strong correlations5 were found between current eyesight and volunteers’ lifetime exposure to sunlight, above all UVB radiation (which is responsible for burning). 研讨发现,志愿者现在的视力与其暴露在阳光下(尤其是导致灼伤的中波紫外线辐射)的时长有很强的相关性。   Those who had gotten the most sun, particularly between the ages of 14 and 19, were about 25 percent less likely to have developed myopia by middle age. 那些常常晒太阳的人,尤其是14岁到19岁之间的人,中年近视的可能性要低25%。   Exposure to sunlight up to the age of 30 also conferred a protective benefit. 30岁之前晒晒太阳也有维护效果。   This relationship held true even when the researchers controlled for education as a marker primarily of time spent reading and gazing at screens. 即便研讨人员把教育作为阅览和盯着屏幕看的主要原因,这种联络依然建立。
1 disorder      n.紊乱,紊乱;骚乱,骚乱;疾病,失调 参阅凯发k8官例句:
  • When returning back,he discovered the room to be in disorder.回家后,他发现屋子里杂乱无章。
  • It contained a vast number of letters in great disorder.里边七零八落地装着许多函件。
2 adolescence      n.青春期,青少年 参阅例句:
  • Adolescence is the process of going from childhood to maturity.青春期是从少年到成年的过渡期。
  • The film is about the trials and tribulations of adolescence.这部电影叙述了青春期的费事和苦恼。
3 adulthood      n.成年,成人期 参阅例句:
  • Some infantile actions survive into adulthood.某些婴儿期的行为一向坚持到成年期。
  • Few people nowadays are able to maintain friendships into adulthood.现在很少有人能将友谊保持到成年。
4 impair      v.危害,损害;削弱,削减 参阅例句:
  • Loud noise can impair your hearing.巨大的噪音有损听觉。
  • It can not impair the intellectual vigor of the young.这不能消灭青年人思维生机。
5 correlations      彼此的联络( correlation的名词复数 ) 参阅例句:
  • One would expect strong and positive correlations between both complexes. 人们往往认为这两个综合体之间有严密的正相关。
  • The correlations are of unequal value. 这些对应联络的价值并不相同。

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