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特殊时期在家学网课 孩子视力问题怎么管?
发布日期: 2020-04-15

疫情还没结束,很多学校选择了开网课,让孩子在家里先学起来,家长们的担忧来了: 不得不接触这些电子产品,孩子的视力保护要注意什么,如何能做到不让近视产生或加重?急家长所急,儿童眼科医生吴云艳大夫进行了解答。

北京赛车网址1,shiyongzhengquededuxiezishihenzhongyao。zishiyaoduanzheng,zuodao“sangeyi”,ji1、 shouzhijulibijianyicun2、yanjingjulishubenyichi 3、qianxiongyuzhuoyanyaobaochiyigequantoudejuli。haizizaijiaxuexiquefazijuezilvxing,xuyaojiazhangdejiandu。qiejibuyaotangzhehuozhepazhexuexi。

2,baochiyueduhuanjingzhongshiyideguangliangduheduibidu,meigezhuomiandezhaoduyingzai500 lxyishang①,zhaomingyingwuxuanguanghuoshanshuo。qiejibuyaozaicesuodengguangbijiaohunandehuanjingxiakanshu。

3,jinliangshiyongzhizhiyuedudaitidiannao、ipadshiyong。yangekongzhijinjuliyongyanshijian。jinjuliyongyan(ipad、diannao、kanshu、xiezi、huahua、wanlegao、dangangqindeng)30-40fenzhongxiuxi10fenzhong。xiuxi10fenzhongyouyubunengsuiyiwaichukeyizaiyangtai、chuanghubianyuantiao10fenzhong,huozhezaizijiayuanzilijinliangkanyuan10fenzhong,jiazhangyekeyipeibanhaiziwan10fenzhongyuantiaodeyouxibirutoufeibiaodeng,youyuzheishibijiaokuzaodexingwei,jiazhangkeyipeibanhaiziyiqizuocongerbaozhengdadaoshiyanjingyouxiaofangsongdexiaoguo。

北京赛车网址4,kandianshimeicishaoyu30-40fenzhong,meirikeyikan1zhi2ci,kandianshidejuliyaozhishao3miyiwai,zuihaoshizaidianshipingmuduijiaoxian5beizhangdujulikandianshi。

北京赛车网址5,baozhengmeirijinxingtiyuduanlian。keyizaijiatiaocao、tiaosheng、fuwocheng、tijianzideng,youtiaojiandejiatingkeyizaijialidapingpangqiu。

北京赛车网址6,meirizuoxishijianguilv,baozhenghaizimeiri8zhi10xiaoshichongzushuimian。

北京赛车网址7,helijunhengyinshi,duoshuiguoshucai,shaoshitianshi,duochiyingzhishipin。jujiaobeiyuweilingleide“yanbaojiancao”nengyufangjinshiyandefasheng。ruguojiechurizhaojiaoshao,keyimeiribuchong10weikedeweishengsud3。

8,duiyupeidaiokjingdehaizilaishuo,yingjianchipeidai,buyaoyinweijianshaoyuanjuliyongyanjiujianshaopeidaiokjing。ruganjueyouyichangyingjishihezijideokjingyishenggoutong,jishijiejuewenti。

北京赛车网址baohushili,yufangjinshi,zheishixuyaohaizihejiazhangyiqinulideshiqing,tebieshizaijiaxuexidezheiduanshijian,jiazhanggengyinggaibangzhuhaiziguankonghaoshiyongdianzichanpindeshijian,yindaohaizizaishangwankecheng,jianghaizidezhuyilizhuanyidaoqitaganxingqudeshiqingshang;tongshijianyijiazhangmenyeyaoyishenzuoze,jianshaozaihaizimianqianwanshouji、ipaddeshijian,yuhaiziduoyixieqingganhudong,jiyuhaizigengduojingshenshangdepeiban。

北京赛车网址neime,yidanhaizishilixiajiang,zaoqihuiyoushenmebiaoxianni?wuyunyanjieshao,jiazhangyinggaiguanzhuhaizishifouyouyixiajidianbiaoxian:

北京赛车网址kanwutishijingchangmiyan: jinshiyinqidemiyandongzuoshiyanjianlunzajishousuozuoyongdejieguo,qiyuanlishiyaoshiweileshitongkongbianxiao,jinruyanjingzhongdeguanggengshao,zengqiangjuguang,yinerkandongxigengqingchu。miyanhuishihaiziyanjingzhouweijirouguodujinzhang,yinqisuanzhangtengtongdengzhengzhuang。

zhuyilibujizhong: haizizaixuexi,birukanshushi,jingchangzhuyilibujizhong,mamayaozixibianbie: shinindetaihaizitaidiaopi,kangjuxuexisuoyinqide?haishishuohaizizaitaobiyongyanpilaojizijidailaidejingshenshangdeyali?tebieshidanghaizibuyuanyihuozhewufabiaodashi,mamamenyidingyaoliuyile。

北京赛车网址tiejinwutikandongxi: danghaizikanwutishizongyaogenwutitiedehenjin,dushuxiezishichangchangbaoyuanwuzilideguangxiantaianshi,yaokaolvdaohaizikenenghuanyoujinshi。

jingchangwaizhetoukanwuti: yixiehuanyouzaoqijinshideertongchangchanghuiwaizhetoukanwuti。zheishiyinweiwaizhetoukanwutikeyijianshaosansheguangxianduiqishilideyingxiang。

wuyunyantixing,haizijiaxingjinshidezhouqihenduan,tongchangzhiyou2-3geyuedeshijian,yidanxingchengzhenxingjinshijiubukenile。yinci,jiazhangmenyidingyaoxuehuitongguoxijiepanduanhaizishiliwenti,cainengzuodaozaofaxian,zaozhiliao。chuxianshangshujigexingweishi,henkenengshuominghaizishiliyijingchuxianwenti,jiazhangyingdaizhehaiziquzhengguiyiliaojigoudeyankezuojiancha。

注释:  

北京赛车网址①zhaodushibeizhaomiandanweimianjishangsuojieshoudeguangtongliang,danweiweilekesi(lx)。zhaodudedingyishiweie=φ/s,eweizhaodu(lx);φweiguangtongliang(lm);sweishouzhaowubiaomianmianji(㎡)。

dangyidianguangyuanzhaoshedaomouyiwutibiaomianshi,gaibiaomiandezhaodue=icosθ/d2,eweizhaodu(lx);θweishouzhaowubiaomianfaxianyudianguangyuanzhaomingfangxiangdejiajiao;dweishouzhaomianyudianguangyuanzhijiandejuli(m);iweidianguangyuanfaguangqiangdu(cd)。

(  文章来源:北京赛车网址|信誉平台
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