文档介绍：爱眼日手抄报资料
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the成的。
如果没有及时纠正不良的读写姿势，并在医生的指导下进行相应治疗，经过一段时间，假性近视即可转变为真性近视。真性近视是因为捷状肌的调节过度、长期痉挛，使眼球从正常的正球形变成了卵圆形，眼球壁的各层组织都相应变薄。现在，还没有一种有效的方法，不管是仪器还是药物，能将已变成卵圆形的眼球返回正圆球状。所以，市场上销售的近视眼治疗仪器和药物的宣传，概念模糊，缺少科学依据。但真性近视是可以预防的，关键在于积极治疗假性近视，阻断其向真性近视开展。
手术治疗要慎重
准分子激光治疗真性近视，是采用高科技原理的治疗方法，优点很多，已经广为人知。从光学原理来探讨，手术是以损伤正常眼角膜的一局部组织来完成的，就像给患者戴了一副无形的近视眼镜，对近视眼的卵圆形眼球和相应的眼底变形改变，没有任何治疗作用。因为可能出现一些并发症，需要谨慎对待。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
，休息十分钟，可以闭目养神，也可以看远处景物。
，不要过近，以一胳膊的长度为适。
，当感觉疲劳时可时常用冷水冲冲眼睛。
。
，可带一副适宜的老花镜，一看清屏幕为好，可以缓解视力疲劳。
以上方法贵在坚持，长期下去才有效，各位保护眼睛的朋友可以参考。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities