The results showed:1. The amplitude of accommodation decreased linearly with age increasing;
结果：正常人随着年龄增加调节幅度呈直线逐渐下降；
P300 average amplitude on parietal area was increasing with age increasing and junior high school group's was significantly lower than two others.
在顶区的P300的平均幅值随着年龄的增长而增加，且初中组明显低于其它两个组。
The osteopenia incidence rate of lumbar vertebrae of each age grade is obviously higher than that of femoral neck (P < 0. 05 ). The incidence of the osteopenia increased with age increasing.
各年龄组腰椎低骨量发生率显著高于股骨颈（P〈0．05），两部位低骨量发生率均随年龄增加而逐渐增加。
With age increasing, the diopter of these subjects had a tendency of hypermetropia from myopia.
随着年龄的增长，人眼的屈光度有由近视向远视变化的趋势。
With age increasing, the diopter of these subjects had a tendency of hypermetropia from myopia.
随着年龄的增长，人眼的屈光度有由近视向远视变化的趋势。
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