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１材料与方法依王有琪坐高数据将收集的胎儿按月分组，５～１０月共六组，经福尔马林固定后，摘出眼球２４６只，沿其赤道径附近剖开，取出晶状体。除去损伤外，共取晶状体２３９个。用游标卡尺（精确度０．０２ｍｍ）专人测量其矢状径和赤道径，并观察其形态，然后用计算器统
1 Materials and Methods According to Wang Youqi sitting height data collected the fetus by month, from May to October a total of six groups, fixed by formalin, extirpation of the eye 246, along its equatorial path near the open, remove the lens. Remove the damage, a total of 239 lenses taken. Measure the sagittal and equatorial diameters with a vernier caliper (accuracy 0.02mm) and observe its morphology, then use a calculator