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对1158名中老年人查体中在角膜显微镜裂隙灯下检查晶体情况进行分析，按年龄分成四个组，晶体混浊情况分成五级，经统计学处理结果表明，各年龄组晶体混浊情况有显著差异，随年龄增长透明晶体（0级）愈来愈少，混浊晶体随年龄增长而增多。71岁以上年龄组未发现0级，晶体基本都处于混浊状态。由于我国人民生活和健康水平的不断提高，人的寿命明显延长，老年人增加，老年性白内障已成为国家防盲治盲的重要任务。
1158 cases of middle-aged and elderly people in the examination of corneal slit lamp under the microscope to analyze the situation, divided into four groups by age, crystal opacity is divided into five levels, the results of statistical analysis showed that the crystal opacities in all age groups were significant Differences, with age, less and less transparent crystal (0), opacity increases with age. No grade 0 was found in those over 71 years of age, and the crystals were mostly in a turbid state. Due to the continuous improvement of people’s life and health in our country, the life expectancy of people has been significantly prolonged and the number of elderly people has increased. Senile cataract has become an important task of national prevention of blindness.