1) the ratio of mal-eyesight
视力低下发生率
2) the rate of sight-short
视力低下率
3) Poor eyesight
视力低下
1.
[Results]Poor eyesight rate grew with higher grade,but the growth rate altered bigger in low-grade students than high-grade students;the situation of kids in urban school and primary school were worse than kids in suburban school and ordinary school,but the poor eyesig.
[目的]了解钦州市小学生视力低下的情况,为做好小学生视力保护预防工作提供依据。
4) Hypopsia
视力低下
1.
Monitoring and Analysis of Hypopsia in Middle and Primary School Students in Longyan City from 2002 to 2006;
2002~2006年龙岩市部分中小学生视力低下监测分析
5) Weak eyesight
视力低下
1.
[Objective] To discover the growing regularity and dynamic trend of weak eyesight of primary and middle school students.
[目的]探讨和掌握深圳市福田区中小学生视力低下的发展规律和动向。
6) Poor sight
视力低下
1.
Results The rate of poor sight in the key high schools was higher than that of the ordinary schools.
目的 了解曹县重点高中与普通高中学生视力低下状况 ,为防治提供科学依据。
补充资料：低出生体重儿发生率
低出生体重儿发生率
指某地区年内每100名活产数中，出生体重低于2500g的新生儿发生数之比值。其计算公式为：低出生体重儿发生率＝〓〓某年某地区出生体重〓〓低于2500g的新生儿数〓〓年内该地区活产数〓〓×100%出生低体重儿有因孕龄低，而体重与孕龄相符，其预后与早产儿相似。有孕龄达足月而体重低于2500g者为足月低体重，其预后常不同于早产儿。足月低体重儿死亡率常较早产儿低，即使存活者其智力发育也常较慢，不如早产儿存活者。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条