天气预报 > 其他 > 孩子视力多少算正常屈光度
孩子视力多少算正常屈光度
更新时间: 2020-11-04 00:00:00  

孩子视力+1.75~+2.00D算正常屈光度。屈光度是屈光力的大小单位,以D表示,即指平行光线经过该屈光物质,以焦点在1m时该屈光物质的屈光力为1屈光度或1D。以透镜而言,是指透镜焦度的单位如一透镜的焦距1m时,则此镜片的屈折力为1D屈光度与焦距或反应。

关键词: 孩子 视力 多少 正常 屈光度

孩子视力多少算正常屈光度相关经验

天气预报

最新推荐

页面:/news/view-1725225/ | 耗时:0.1628 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=1725225 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1725225 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1725225 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1107923,2168122,2356597,1324754,2015578,2697431,1902196,1125415,2659107,1997424,2000635,1901717,147811,2424393,1096280,1303423,1056746,1079027,686552,1561396,439021,2537516,1128249,1127141,909361,945732,2194384,800564,2662619,474577) ORDER BY field (ArticleID,1107923,2168122,2356597,1324754,2015578,2697431,1902196,1125415,2659107,1997424,2000635,1901717,147811,2424393,1096280,1303423,1056746,1079027,686552,1561396,439021,2537516,1128249,1127141,909361,945732,2194384,800564,2662619,474577)