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《Chinese Journal of Clinical Medicine》 2018-04
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Influence of environmental humidity on the stability of young people's tear film

GAO Fen;ZHANG Wan-ting;WANG Lei;MU Dong-wei;Department of Ophthalmology,Kaifeng Central Hospital;  
Objective:To explore the relationship between the environmental humidity and the stability in various parameters regarding the tear film of the yong people.Methods:209 patients aging from 17 to 35 years old(417 eyes),133 male patients(265 eyes)and 76 female patients(152 eyes)were enrolled in this study from October 2015 to December 2016.Average age was(22.47±4.74)yeras old.According to the different environmental humidity during their treatment,they were divided into 3 groups:environmental humidity40% was taken as low humidity group,76 patients(151 eyes);that between 40%~70% was taken as middle humidity group,75 patients(150 eyes);and that70% was taken as high humidity group,58 patients(116 eyes).Keeping the patients staying under the specific environment for 1 hour respectively,and then consulting them regarding the dry eye questionnaire,and measure the average breakup time in non-invasive tear film,the height in non-invasive tear meniscus,the score in lipid layer and the lacrimal secretion test with Keratograph ocular surface synthesis analyzer,three sets of different data were analyzed by one-way ANOVA.The difference between the parameters under different environmental humidity was analyzed.Results: The analysis resulting from the dry eye subjective questionnaire indicated that the grading result of high humidity group respectively was(1.37±1.52)s,which was lower than that of the low and middle group,(2.27±2.11)s and(1.97±1.82)s,the difference between two groups had statistical sense(P0.05).The breakup time of tear film in the low humidity group was(10.67±4.41)s,which was shorter than the other two groups([12.42±4.47]s and[12.81±5.32]s),the difference both between these three groups(P=0.001,P0.001)were with statistical significance.The results of the height in non-invasive tear meniscus among the high humidity group was(0.24±0.06)mm,higher than the other two groups which were(0.24±0.07)mm,(0.26±0.06)mm,respectively.The difference between three groups(P0.001,P=0.017)were statistically significant;the lipid layer grading results of the low humidity group was 1.43±1.28,higher than the other two groups(0.51±0.95 and 0.36±0.91),both the difference between groups(P0.001,P0.001)were statistically significant.The fluorescein stain score of the three groups respectively was 0.09±0.36,0.05±0.21,and 0.03±0.16,the differences among the three groups were all out of statistic significance.The lacrimal secretion test results of the three groups respectively was(17.65±8.81)mm,(19.13±9.53)mm,and(18.94±9.62)mm,and the difference among the three groups had no statistic significance.The difference among the three groups of the lacrimal secretion test had no statistic significance.Conclusions:The stability of the tear film is closely related to the environmental humidity,the higher the humidity is,the better stability the tear film has.When the humidity is more than 40%,the stability of the tear film will be maintained in the breakup time of the tear film and the scores in the lipid layer.
【Fund】: 开封市科技发展计划项目(1403057)~~
【CateGory Index】: R779.6
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