使用视频显示终端对大学生干眼的影响

The Effect of Using Video Display Terminal on College Students’Dry Eye

探讨了大学生群体中干眼症发病情况及视频显示终端阅读时间对泪膜破裂时间(Break-up Time, BUT)的影响,以38名大学生(44眼)作为受试对象,根据干眼诊断分为干眼组(n=25)及健康组(n=19),对受试者进行视力、眼压、干眼问卷评分(Ocular Surface Disease Index, OSDI)、泪膜破裂时间和测量泪液分泌等检查。根据数据的正态分布和方差齐性,采用Mann-Whitney U检验、配对T检验及独立样本T检验。结果发现干眼组和健康组之间OSDI评分不存在统计学差异,而BUT存在统计学差异(P=0.000),表明在受试者群体中仍然有部分学生因为症状不明显没有进行干眼的诊断。受试者在使用视频显示终端(VDT)进行阅读前后,其BUT对比存在统计学差异(P=0.016);干眼组和健康组之间在不同VDT阅读时间组中对比不存在统计学差异。说明无论对于干眼人群还是健康人群,长时间使用手机屏幕会降低泪膜稳定性,但干眼人群及健康人群之间并不存在明显的统计学差异。

To investigate the incidence of dry eye in college students and the effect of different using time of visual display terminals(VDT) on the break-up time of the tear film(BUT), thirty-eight college students(44 eyes) were studied. All included eyes were divided into dry eye group(n=25) and healthy group(n=19) according to the diagnosis of dry eye. Visual acuity, intraocular pressure, ocular surface disease index(OSDI), BUT and schirmer testⅠwere applied to each subject. According to results of the normal test and homogeneity test of variance, Mann-Whitney U test, paired T-test and independent sample T-test were obtained. Results showed that there was no statistical difference in OSDI score between the dry eye group and the healthy group, but difference existed between the dry eye group and the healthy group in BUT(P =0.000), suggesting that there were still a part of students who did not receive the timely diagnosis of dry eye because of unconspicuous dry eye symptoms. There was significant difference in BUT before and after VDT(P =0.016) reading. However, there was no difference between the dry eye group and the healthy group in different VDT reading time groups, indicating that for both the dry eye group and the healthy group, long-term use of mobile phone screen would reduce tear film stability, but this instability of tear film made no difference between the dry eye group and the healthy group.