老年人泪膜破裂时间的观察
泪膜破裂时间；老年,,],泪膜破裂时间；老年,1资料与方法,2结果,3讨论,[参考文献]
[摘要] 目的 调查目前老年人的泪膜破裂时间的状况，了解对眼表面泪膜稳定性的相关因素。方法 随机选择≥60岁患者，共602眼,一人一卡，定点暗室，定人操作，用微量加样器定量，将2%荧光素7μl滴入下结膜囊内，在裂隙灯显微镜9mm钴兰光束下观察，用电子秒表同步记录出现第一个干燥斑的时间。结果 在温度为(21.50±2.37)℃，湿度为(63.96±13.17)%的条件下，泪膜破裂时间为(4.57±1.44)s。男女组间比较差异均有非常显著性(u=9.11，P<0.01)。结论 泪膜稳定性的下降正影响着老年人的健康生活质量；局部毒性可是药物本身对角膜上皮的毒性作用，也可是防腐剂所致的毒性作用；另外，环境污染也是影响泪膜稳定性的因素之一。[关键词] 泪膜破裂时间；老年
Observation of tear film breakup time of aged person
LI Xiaoyan，YAN Xuejun，CAO Yongbao,et al.Department of Ophthalmology,Zhejiang Hospital,Hangzhou 310013,China
[Abstract] Objective To study the tear film breakup time of aged person to find out the affecting factors related to the stability of tear film of eyes.Methods Randomly selecting 602 eyes from adults above 60 years old,one recording card for one person.In specific darkroom and by specific operator,dropping 7 μl of 2%Fluorescein Sodium into conjunctiva bursa.Then observing its changes under microscope in 9mm cobalt blue beam of slit lampmicroscope and recording the time when the first dry macula is formed with a stopwatch.Results When temperature is (21.50±2.37)℃ and relative humidity is (63.96±13.17)%,the tear film breakup time is (4.57±1.44) seconds.There is statistically significant difference from sex (u=9.11 ......
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