原标题：北京眼科医生陶勇 ：近视度数不断增加或致盲
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【注意！#陶勇说近视度数不断增加或致盲#】@北京眼科医生陶勇：青少年近视率越来越高，高中有80%，非常严峻。眼球会随着度数增加被不断拉长，这个过程可能导致视网膜变薄、萎缩、脱离，甚至可能致盲。保护视力要牢记“20—20—20”法则：每20分钟看至少20英尺（6米）远的物体20秒以上。
