眼睛大的人更容易近视？
<p>一双美丽的大眼睛通常都被视为相貌上的优势，可英国眼科专家却表示，大眼睛的人更容易得近视眼。所以从这个角度来说，大眼睛反而成了一个弱点。专家指出，近视眼是由于外界光线焦点没有正确落在视网膜上而造成的，大眼睛的人因为眼球太大而导致外界光线焦点没有落在视网膜上，而是落在视网膜前方，因而无法在视网膜上形成清晰的图像。与此相反，眼睛小的人更容易得远视眼，也就是外界光线焦点落在视网膜后方。</p><p>英国患近视眼的人在不断增加，目前全国约有一半人是近视眼。专家表示，眼睛前后直径平均值为24毫米，比这个数值高出1毫米，眼睛就会明显近视；而高出2到5毫米则是高度近视。专家解释称，现在近视的人越来越多可能是因为大家待在室内的时间过多，外界自然光线会让眼球自动调节生长状态，避免眼球过大，而室内的人造光线则没有这个功效。</p><p><span word="Rebecca">Rebecca</span> <span word="Large">Large</span> <span word="has">has</span> <span word="always">always</span> <span word="been">been</span> <span word="told">told</span> <span word="her">her</span> <span word="big">big</span> <span word="brown">brown</span> <span word="eyes">eyes</span> <span word="are">are</span> <span word="her">her</span> <span word="best">best</span> <span word="feature">feature</span>. <span word="Like">Like</span> <span word="those">those</span> <span word="of">of</span> <span word="Hollywood">Hollywood</span> <span word="stars">stars</span> <span word="Angelina">Angelina</span> <span word="Jolie">Jolie</span> <span word="and">and</span> <span word="Audrey">Audrey</span> <span word="Hepburn">Hepburn</span>, <span word="Rebecca">Rebecca</span>'<span word="s">s</span> <span word="eyes">eyes</span> <span word="are">are</span> <span word="regarded">regarded</span> <span word="by">by</span> <span word="most">most</span> <span word="as">as</span> <span word="a">a</span> <span word="sign">sign</span> <span word="of">of</span> <span word="beauty">beauty</span>.</p><p><span word="Yet">Yet</span> <span word="eye">eye</span> <span word="experts">experts</span> <span word="have">have</span> <span word="realised">realised</span> <span word="that">that</span> <span word="far">far</span> <span word="from">from</span> <span word="being">being</span> <span word="an">an</span> <span word="asset">asset</span>, <span word="large">large</span> <span word="eyes">eyes</span> <span word="can">can</span> <span word="actually">actually</span> <span word="be">be</span> <span word="a">a</span> <span word="weakness">weakness</span>, <span word="and">and</span> <span word="make">make</span> <span word="someone">someone</span> <span word="more">more</span> <span word="prone">prone</span> <span word="to">to</span> <span word="being">being</span> <span word="short">short</span>-<span word="sighted">sighted</span>.</p>
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