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测定了不同冷冻时间(20秒和3分钟)对不同方法保存兔角膜膨胀率的影响。结果显示:冷冻20秒及3分钟,干燥保存组角膜膨胀率与新鲜组及低温冷冻保存组均有显著性差异(P<0.01)。冷冻20秒和3分钟两组相比,三种保存方法的角膜膨胀率均有统计学差异(P<0.05)。提示在角膜组织镜片加工时,应考虑不同保存方法和不同冷冻时间所造成的不同膨胀率对其厚度的影响,从而减少镜片加工时的屈光度误差。
The effect of different freezing time (20 seconds and 3 minutes) on the corneal swelling rate of rabbits preserved in different ways was measured. The results showed that there was a significant difference (P <0.01) between corneal swelling rate in fresh and frozen groups after 20 and 3 minutes of freezing. There were significant differences in corneal swelling between the three preservation methods (P <0.05) when compared with the control group after freezing for 20 seconds and 3 minutes respectively. Tip corneal tissue lens processing, should consider different preservation methods and different freezing time caused by different expansion rate of its thickness, thereby reducing the lens processing diopter error.