囧研究：别让学生再做作业了！近视成大问题
<p><span word="Could">Could</span> <span word="sending">sending</span> <span word="your">your</span> <span word="child">child</span> <span word="to">to</span> <span word="a">a</span> <span word="good">good</span> <span word="school">school</span> <span word="and">and</span> <span word="making">making</span> <span word="sure">sure</span> <span word="they">they</span> <span word="do">do</span> <span word="their">their</span> <span word="homework">homework</span> <span word="be">be</span> <span word="putting">putting</span> <span word="their">their</span> <span word="eyesight">eyesight</span> <span word="in">in</span> <span word="serious">serious</span> <span word="danger">danger</span>? <span word="That">That</span>'<span word="s">s</span> <span word="the">the</span> <span word="concern">concern</span> <span word="raised">raised</span> <span word="by">by</span> <span word="research">research</span> <span word="that">that</span> <span word="reveals">reveals</span> <span word="alarmingly">alarmingly</span> <span word="strong">strong</span> <span word="links">links</span> <span word="between">between</span> <span word="time">time</span> <span word="spent">spent</span> <span word="studying">studying</span> <span word="hard">hard</span> <span word="and">and</span> <span word="childhood">childhood</span> <span word="short">short</span>-<span word="sightedness">sightedness</span> - <span word="myopia">myopia</span> - <span word="that">that</span> <span word="can">can</span> <span word="lead">lead</span> <span word="to">to</span> <span word="serious">serious</span> <span word="eye">eye</span> <span word="diseases">diseases</span>.</p><p>把孩子送进好学校、确保他们做作业，会不会置其于视力之虞呢？这正是研究关心的问题。研究结果堪忧：勤奋学习所花的时间和儿童近视问题有密切关联，近视可能引发严重眼疾。</p><p><span word="Myopia">Myopia</span> <span word="causes">causes</span> <span word="distant">distant</span> <span word="objects">objects</span> <span word="to">to</span> <span word="appear">appear</span> <span word="blurred">blurred</span>, <span word="while">while</span> <span word="close">close</span> <span word="ones">ones</span> <span word="can">can</span> <span word="be">be</span> <span word="seen">seen</span> <span word="clearly">clearly</span>. <span word="It">It</span> <span word="often">often</span> <span word="develops">develops</span> <span word="in">in</span> <span word="childhood">childhood</span>, <span word="with">with</span> <span word="the">the</span> <span word="eyeball">eyeball</span> <span word="starting">starting</span> <span word="to">to</span> <span word="elongate">elongate</span>, <span word="becoming">becoming</span> <span word="more">more</span> <span word="egg">egg</span>-<span word="shaped">shaped</span> <span word="than">than</span> <span word="spherical">spherical</span>, <span word="or">or</span> <span word="the">the</span> <span word="lens">lens</span> <span word="becoming">becoming</span> <span word="too">too</span> <span word="curved">curved</span>, <span word="so">so</span> <span word="the">the</span> <span word="light">light</span> <span word="entering">entering</span> <span word="the">the</span> <span word="eye">eye</span> <span word="is">is</span> <span word="not">not</span> <span word="focused">focused</span> <span word="correctly">correctly</span>.</p><p>近视会引发看远处的事物模糊，而近处的清晰可见。这通常是童年时形成的，眼球逐渐被拉长，变得越发像蛋形而非球形；或者是因为晶状体过度弯曲，进入眼睛的光线无法正确聚焦。</p><p><span word="It">It</span> <span word="looks">looks</span> <span word="as">as</span> <span word="if">if</span> <span word="schoolwork">schoolwork</span> <span word="might">might</span> <span word="be">be</span> <span word="a">a</span> <span word="strong">strong</span> <span word="risk">risk</span> <span word="factor">factor</span> <span word="for">for</span> <span word="myopia">myopia</span> <span word="in">in</span> <span word="children">children</span>. <span word="In">In</span> <span word="East">East</span> <span word="Asia">Asia</span>, <span word="where">where</span> <span word="children">children</span> <span word="are">are</span> <span word="often">often</span> <span word="academically">academically</span> <span word="hothoused">hothoused</span> <span word="from">from</span> <span word="an">an</span> <span word="early">early</span> <span word="age">age</span>, <span word="the">the</span> <span word="rise">rise</span> <span word="in">in</span> <span word="myopia">myopia</span> <span word="is">is</span> <span word="even">even</span> <span word="greater">greater</span>.</p><p>似乎学校作业是引起儿童近视显著的风险因素。在东亚，孩子很小就被圈起来读书，近视眼人数增长更快。</p>
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